57mm Single Carbo Ratchet Cheek BlockCarbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. Features: Sheave A~ (mm): 57 mm; Sheave A~ (in): 2-1/4 in; Maximum line A~ (mm): 10 mm; Maximum line A~ (in): 3/8 in; Maximum working load (kg): 227 kg; Maximum working load (lb): 500 lb; - cis2:mm5mnJlm -