Blocks

Series 20 Ball Bearing Block - Swivel Hook Head Features: Low friction High static and dynamic load capacity Lightweight Low profile swivelling hook for quick and easy attachment Hook suits rope, stai... More Details

Series 20 Ball Bearing Block - Single, Loop Mount Features: Low friction High static and dynamic load capacity Lightweight Single point mounting Precision molded Acetal sheaves running on stainless st... More Details

Series 20 Ball Bearing Block - Single - Loop Top Becket Features: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® b... More Details

Series 20 Ball Bearing Block - Single - Loop Top Features: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball bea... More Details

Series 20 Ball Bearing Block - Single - Exit Cover Plate Features: Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction Applicati... More Details

Series 20 Ball Bearing Block - Single - Cheek Rivet Mount Features: Low friction High static and dynamic load capacity Lightweight Suitable for screw or pop rivet mounting Precision molded Acetal shea... More Details

Series 20 Ball Bearing Block - Single - Cheek Features: Low friction High static and dynamic load capacity Lightweight Double through-bolt mounting for maximum load capacity Precision molded Acetal sh... More Details

Series 20 Ball Bearing Block - Single Features: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provi... More Details

Series 20 Ball Bearing Block - Loop Top Linked Features: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball beari... More Details

Series 20 Ball Bearing Block - Double, In-Line Features: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball beari... More Details

Series 20 Ball Bearing Block - Double - Becket - 2-Axis Shackle Head Features: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel... More Details

Series 20 Ball Bearing Block - Double - 2-Axis Shackle Head Features: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlo... More Details

Series 19 Utility Block™ - Single - Ferrule Eye Head Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance. Hollow rivets in the block heads can be fi... More Details

Series 15 Webbing Block Ronstan’s Series 15 blocks are available in 15 different configurations or as a sheave only. The smallest and lightest ball bearing blocks on the market, stainless steel ball b... More Details

Series 15 Ball Bearing Utility Block - Upright Lead Block Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide h... More Details

Series 15 Ball Bearing Utility Block - Triple Block, Becket, Loop Head Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball beari... More Details

Series 15 Ball Bearing Utility Block - Stand-Up Block Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide high ... More Details

Series 15 Ball Bearing Utility Block - Single, Swivel Shackle Head Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings ... More Details

Series 15 Ball Bearing Utility Block - Single, Swivel Hook Head Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings pro... More Details

Series 15 Ball Bearing Utility Block - Single Block, Loop Head Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings prov... More Details

Series 15 Ball Bearing Utility Block - Single Block, Becket, Loop Head Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball beari... More Details

Series 15 Ball Bearing Utility Block - Pivoting Lead Block Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide ... More Details

Series 15 Ball Bearing Utility Block - Exit Block Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide high perf... More Details

Series 15 Ball Bearing Utility Block - Double, Loop Head Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide hi... More Details

Series 15 Ball Bearing Utility Block - Double, Becket Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide high ... More Details

Series 15 Ball Bearing Utility Block - Cheek Block Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide high per... More Details

Series 15 Ball Bearing Block - Triple Features: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide high performance & lo... More Details

S70 Soft Attachment Block - Single Easy to attach and easy to open, Ronstan's soft attachment snatch blocks are built to perform and built to last. With the shackle open, cheek plates twist to open th... More Details

S60 Soft Attachment Block - Single Easy to attach and easy to open, Ronstan's soft attachment snatch blocks are built to perform and built to last. With the shackle open, cheek plates twist to open th... More Details

S40 Soft Attachment Block - Single Easy to attach and easy to open, Ronstan's soft attachment snatch blocks are built to perform and built to last. With the shackle open, cheek plates twist to open th... More Details

RF568 Lead Block Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.When mounted in an inverted position, are frequently used as upright l... More Details

Race Sheave - Acetal Ball Bearing - 66mm(2-5/8") OD Precision moulded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. Acetal Sheaves: Choice of beari... More Details

Race Sheave - Acetal Ball Bearing - 50mm(1-15/16") OD Precision moulded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. Acetal Sheaves: Choice of bea... More Details

Race Sheave - Acetal Ball Bearing - 28mm(1-1/8") OD Precision moulded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. Acetal Sheaves: Choice of beari... More Details

Race Acetal Sheave Solid Bearing - 39mm(1-1/2") OD Features: High strength & durability, utilizing the self-lubricating properties of Acetal More Details

Nylatron Sheave Box - Single Upright Lead Block Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.When mounted in an inverted position, a... More Details

Kite Block - Black w/White Sheave Features: Lightweight durable construction Economical Maintenance free Applications: Vang, cunningham and trapeze retriever systems on dinghies Leech line tackles, bu... More Details

90mm Synchro Block - Single Lewmar's Synchro Blocks are engineered for speed, efficiency, and superior handling.  Using a combination of scientifically optimized block geometry, a Free-Spin bearing, a... More Details

72mm Synchro Block - Single Lewmar's Synchro Blocks are engineered for speed, efficiency, and superior handling.  Using a combination of scientifically optimized block geometry, a Free-Spin bearing, a... More Details

72mm HTX Block - Single Years of design and manufacturing experience coupled with collaboration with boat builders, designers, and sailors have resulted in the Lewmar HTX Hardware Range. Drawing upon ... More Details

60mm Synchro Block - Single Lewmar's Synchro Blocks are engineered for speed, efficiency, and superior handling.  Using a combination of scientifically optimized block geometry, a Free-Spin bearing, a... More Details

60mm HTX Block - Single Years of design and manufacturing experience coupled with collaboration with boat builders, designers, and sailors have resulted in the Lewmar HTX Hardware Range.  Drawing upon... More Details

50mm Synchro Block - Single Lewmar's Synchro Blocks are engineered for speed, efficiency, and superior handling.  Using a combination of scientifically optimized block geometry, a Free-Spin bearing, a... More Details

Midrange Single with Aluminum Sheave Block Midrange blocks’ robust construction makes them ideal to handle the high loads found on medium and large offshore boats. Sheave runs exclusively on a ball be... More Details

Midrange Single Block Midrange blocks’ robust construction makes them ideal to handle the high loads found on medium and large offshore boats. Sheave runs exclusively on a ball bearing system for fast... More Details

Midrange Double Block Midrange blocks’ robust construction makes them ideal to handle the high loads found on medium and large offshore boats. Sheave runs exclusively on a ball bearing system for fast... More Details

80mm Single Element Block Mastbase with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. ... More Details

80mm Element Stand Up Block Stand-up blocks are an addition to our Element line. Use them for sheeting and halyard systems, running backstays, controls and other applications where you don’t want the ... More Details

75mm Carbo Air Block with Swivel Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks ha... More Details

60mm Triple Aluminum Element Block with Swivel & Becket Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very... More Details

60mm Triple Aluminum Element Block with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. ... More Details

60mm Single Element Block Mastbase with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. ... More Details

60mm Single Aluminum Element Block with Swivel & Becket Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very... More Details

60mm Single Aluminum Element Block with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. ... More Details

60mm Element Triple Block Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s design pair... More Details

60mm Element Stand Up Block Stand-up blocks are an addition to our Element line. Use them for sheeting and halyard systems, running backstays, controls and other applications where you don’t want the ... More Details

60mm Double Aluminum Element Block with Swivel & Becket Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very... More Details

60mm Double Aluminum Element Block with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. ... More Details

57mm Triple Carbo Block - Swivel, Becket, Cam Cleat Carbo Ratchets allow sailors to hand-hold loaded lines and offer a balance between holding power and controlled easing. Features: Sheave Ø (mm) 57 m... More Details

57mm Single Carbo Ratchet Cheek Block Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing.  Features: Sheave Ø (mm): 57 mm Sheave Ø (in... More Details

57mm Quad Block Swivel, Center Becket Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have... More Details

57mm Carbo Single Ratchet Block with Swivel & Becket Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing.  Features: Sheave Ø (mm): 57 ... More Details

57mm Carbo Single Ratchet Block with Swivel Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. Features: On/off switch operates from ... More Details

57mm Carbo Quad Block - Swivel Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very h... More Details

57mm Carbo Block Flip Flop with Cam Small Boat Flip-Flop blocks pivot around the line axis to keep the line close to the deck. Hinged construction allows for various lead angles. Features: Sheave Ø (m... More Details

57mm Carbo Air Fiddle Block with Swivel & Becket Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, c... More Details

57mm Carbo Air Block with Swivel Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks ha... More Details

57mm Aluminum Low Load Black Magic Block with Swivel Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are use... More Details

45mm Triple Element Block with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s... More Details

45mm Triple Element Block with Swivel & Becket Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. ... More Details

45mm Single Element Block with Swivel & Becket Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. ... More Details

45mm Single Element Block with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s... More Details

45mm Single Aluminum Element Fiddle Block with Swivel, Becket & 150 Cam Cleat Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously... More Details

45mm Single Aluminum Element Fiddle Block with Swivel & 150 Cam Cleat Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemp... More Details

45mm Double Element Block with Swivel & Becket Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. ... More Details

45mm Double Element Block with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Element’s... More Details

45mm Aluminum Black Magic Air Block with Swivel Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for... More Details

40mm/29mm Carbo Traveler Block Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have... More Details

40mm Twing Block Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working lo... More Details

40mm Pivoting Lead Block - Carbo-Cam® Cleat High-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and as “headknockers” on dinghies and beachcats for sheeting ... More Details

40mm Double Sheave Fishing Block Low-friction Carbo Air blocks are lightweight, strong, and reliable. These compact blocks have very high working loads and smooth operation to simplify the positioning... More Details

40mm Carbo Single Ratchet Block with Swivel Becket & Cam Cleat Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing.  Features: Sheave Ø... More Details

40mm Carbo Single Ratchet Block with Swivel & Becket Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. 2608, 2609, and 2614 have on/... More Details

40mm Carbo Single Ratchet Block with Swivel Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. 2608, 2609, and 2614 have on/off switc... More Details

40mm Carbo Single Fixed Block Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have ... More Details

40mm Carbo Block with Spring & Eyestrap Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact bl... More Details

40mm Carbo Block Single with Swivel & Bracket Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, comp... More Details

40mm Carbo Block 90° Fixed Head Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks hav... More Details

40mm Carbo Air Triple Swivel Block with Becket Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, com... More Details

40mm Carbo Air Triple Swivel Block Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks ... More Details

40mm Carbo Air Pivoting Lead Block with Aluminum Cam-Matic® Cleat High-strength pivoting lead blocks with cams are used for halyard controls on larger keelboats and as “headknockers” on dinghies and b... More Details

40mm Carbo Air Fiddle Block with Swivel & Becket Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compa... More Details

40mm Carbo Air Fiddle Block with Swivel Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks... More Details

40mm Carbo Air Double Swivel Block with Becket Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, com... More Details

40mm Carbo Air Double Swivel Block Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks ... More Details

40mm Carbo Air Double Fixed Block with Becket Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, comp... More Details

40mm Carbo Air Double Fixed Block Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks h... More Details

40mm Carbo Air Cheek Block Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have ver... More Details

40mm Carbo Air Block with Swivel Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks ha... More Details

40mm Carbo Air Block with Cam Cleat & Becket Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compa... More Details