Harken 57mm Carbo Ratchet Block with Cam Cleat and swivel for quick wrist release and trimming at the mark.
Carbo Ratchets 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 57mm blocks are for jibsheets and spinnakers on medium dinghies.
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 medium 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