HARKEN 51mm Aluminum Midrange Sheave, 1534 Winches_UniPower Radial This 29mm cheek block with

This 29mm cheek block with a curved base is ideal for mast-mounted turning blocks

Universal Head: brass bearing washer in head assembly provides smooth 360° rotation of post and shackle

not across the middle

and sideplates UV stabilized with black additive for maximum protection

They are also perfect to rig clean backstay systems to steady today’s slender masts and adjust mast bend

HARKEN 51mm Aluminum Midrange Sheave, 1534 Winches_UniPower Radial This 29mm cheek block withThe 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. Ball bearings in the 38 mm (1 1 2") and 51 mm (2") sheaves minimize friction. The 25 mm (1") wire sheave uses low friction washers for this purpose. Two 160 sheaves make up the 161 dual sheave universal lead. Use this sheave to divert a line that must turn in