HARKEN 57mm Self-Contained Sheave, 2760 Blocks_Fiddle All the Carbo Ratchets feature

All the Carbo Ratchets feature a recessed On-Off switch that is easily operated from either side

Smooth edges protect your lines from chafing and wear

Lashing or splicing provides a variety of options for securing the block at exactly the right height to maintain a fair lead

Installation requires clamping or securing inner race

It is used for main and jib sheets on course racing keelboats

HARKEN 57mm Self-Contained Sheave, 2760 Blocks_Fiddle All the Carbo Ratchets featureThe Micro, Bullet, and Big Bullet sheaves are Delrin with Delrin ball bearings. They are scored for rope. 16 mm sheaves are Delrin and feature stainless ball bearings that ride in a grooved race. Midrange sheaves come in either Delrin or aluminum for wire. Wire sheaves are Hard Lube anodized aluminum that rides on high load composite bearings. Ball bearings in the 38 mm (1 1 2") and 51 mm (2") sheaves minimize friction. The 25 mm (1") wire sheave uses