LEWMAR 90mm Synchro Double Block - Swivel, 29929002BK Block Size_38 mm They also perform a variety

They also perform a variety of control functions on many boats

Harken offers these patented

Formulated to lubricate pawls

but these truly Classic blocks can be found in an endless variety of applications

Core Blocks™ is a true all-around solution

LEWMAR 90mm Synchro Double Block - Swivel, 29929002BK Block Size_38 mm They also perform a varietyThe 90mm double block is well suited for vangs, mainsheet systems, and halyard tuning systems. The larger sheave diameter works well with lines up to 9 16". Synchro blocks combine geometry, sheave ratios, and a unique Free Spin bearing to deliver performance thats comparable to ball and roller bearing blocks used in racing but at a more affordable price. Designed to optimize the relationship between block and line, these blocks have self aligning