Harken 75mm Carbo Ratchamatic Cheek Block allows shifting between ratchet and light-air modes.
Carbo Ratchet cheek 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 cheek blocks 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.
Ratchet cheek blocks include metric panhead screws, washers and nuts
Use for spinnaker sheet systems on dinghies, sportsboats, and larger keelboats
Ratchet cheek 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