HARKEN 51mm Aluminum Midrange Sheave, 1534 Winches_UniPower Radial The 90mm double block is

The 90mm double block is well suited for vangs

in accordance with ISO 3506 (not to be confused with A2 tool steel)

The ratchet engagement can be adjusted to a higher or lower load depending on the sailor’s strength

PVC holder fits one standard or lock-in handle

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

HARKEN 51mm Aluminum Midrange Sheave, 1534 Winches_UniPower Radial The 90mm double block isThe 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