Our 30mm Dynamic Composite Cheek Block is the top choice for applications where a continuous sheave movement is necessary. These cheek blocks are designed to be securely attached to a flat surface and are perfect for guiding lines along a deck, around corners, or into a cleat. They are held in place by two screws, one through the sheave and the other through the countersunk hole in the head of the block. Our patented bearing system features twin rows of stainless-steel ball bearings running on a stainless-steel rail, providing exceptional load-carrying capability and durability compared to other bearing systems that use a plastic rail.