Harken 75mm Carbo Ratchamatic Block with Cam arms can be locked in more than five positions for fair leads.

Carbo Ratchet blocks allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. Lightweight Carbo Ratchets are available in 40mm, 57mm and 75mm sizes. All the Carbo Ratchets feature a recessed On-Off switch that is easily operated from either side. The 40mm cam-arm versions work in ratchet mode only. Commonly 75mm blocks are for jibsheets and spinnakers on larger keelboats.  

The 40mm, 57mm and 75mm Carbo Ratchamatic® is adjustable for many applications and weather conditions. The load-sensing ratchet block rolls freely in both directions under low loads, then engages the ratchet automatically as loads increase. With 180 degree wrap, you get a 10:1 holding power. 

• Hand-hold your loaded lines
• Use for spinnaker sheet systems on dinghies, sportsboats, and larger keelboats
• Ratchet blocks are hand and crew savers
• Allows a line to be eased instantly with control
• On/Off switch allows the ratchet to be turned off in light air
• Hardkote-anodized aluminum sheaves
• Stainless steel swivel shackle
• Sheave Diameter: 2 15/16" (75 mm)
• Max. Line Diameter: 7/16" (12 mm)
• Max. Working Load (MWL): 600 lb. (272 kg)
• Breaking Load: 1500 lb. (680 kg)
• Weight: 15.5 oz. (440 g)
• Length: 6 1/2" (165 mm)

75mm Carbo Ratchamatic Single Block with Becket and Cam