40mm Carbo Ratchet Block, Ratchet, 485lb. SWL, 2.0oz. from HARKEN
Control loaded lines with ease Lightweight Carbo Ratchets are available in 40mm, 57mm, and 75mm sizes. The 40mm blocks are perfect for jibsheets and spinnakers on small dinghies where size and weight are critical. 57mm and 75mm sizes have many configurations to fit jibsheets, spinnakers, and mainsheet systems on boats ranging from dinghies to large sportboats. The Cheek Block is also switch-controlled. The 40mm cam-arm versions work in ratchet mode only. Sheave Size: 1-9/16" (40mm).

57mm Carbo Ratchet Block, Ratchet, 500lb. SWL, 3.0oz. from HARKEN
Control loaded lines with ease Lightweight Carbo Ratchets are available in 40mm, 57mm, and 75mm sizes. The 40mm blocks are perfect for jibsheets and spinnakers on small dinghies where size and weight are critical. 57mm and 75mm sizes have many configurations to fit jibsheets, spinnakers, and mainsheet systems on boats ranging from dinghies to large sportboats. The Cheek Block is also switch-controlled. The 40mm cam-arm versions work in ratchet mode only. Sheave Size: 1-9/16" (40mm).

57mm Carbo Ratchet Block, Triple with Cam & Becket, 1,800lb. SWL, 14.5oz. from HARKEN
Control loaded lines with ease Lightweight Carbo Ratchets are available in 40mm, 57mm, and 75mm sizes. The 40mm blocks are perfect for jibsheets and spinnakers on small dinghies where size and weight are critical. 57mm and 75mm sizes have many configurations to fit jibsheets, spinnakers, and mainsheet systems on boats ranging from dinghies to large sportboats. The Cheek Block is also switch-controlled. The 40mm cam-arm versions work in ratchet mode only. Sheave Size: 1-9/16" (40mm).

75mm Carbo Ratchet Block, Ratchet, 750lb. SWL, 8.0oz. from HARKEN
Control loaded lines with ease Lightweight Carbo Ratchets are available in 40mm, 57mm, and 75mm sizes. The 40mm blocks are perfect for jibsheets and spinnakers on small dinghies where size and weight are critical. 57mm and 75mm sizes have many configurations to fit jibsheets, spinnakers, and mainsheet systems on boats ranging from dinghies to large sportboats. The Cheek Block is also switch-controlled. The 40mm cam-arm versions work in ratchet mode only. Sheave Size: 1-9/16" (40mm).

40mm Sheave Diameter Block, Fiddle Style, 485lb. SWL from HARKEN
From the folks who invented ball bearing blocks, this line of blocks boasts an excellent strength-to-weight ratio. 29mm doubles and triples feature a U-lock to hold the swivel in the front or side position, or allow it to spin freely. Use the 40mm blocks for jib and mainsheet systems on high-performance dinghies, and for high-load control lines on small keelboats. The 57mm blocks have an enormous working range that makes them ideal for main and jib sheets, spinnaker halyards and control lines.

40mm Sheave Diameter Block, Triple/Swivel Style, 1,455lb. SWL from HARKEN
From the folks who invented ball bearing blocks, this line of blocks boasts an excellent strength-to-weight ratio. 29mm doubles and triples feature a U-lock to hold the swivel in the front or side position, or allow it to spin freely. Use the 40mm blocks for jib and mainsheet systems on high-performance dinghies, and for high-load control lines on small keelboats. The 57mm blocks have an enormous working range that makes them ideal for main and jib sheets, spinnaker halyards and control lines.