The 30mm Single Dynamic Cheek Block is designed to be mounted on our Profix cheek adapter, allowing for articulation and precise alignment with the rope. Its capabilities make it ideal for leading lines, whether on a deck, into a cleat, or around corners. The block is held in place by a single screw going through the head of the Profix cheek adaptor. Its twin rows of stainless-steel ball bearings, running on a stainless-steel rail, provide a superior load-carrying ability and longevity compared to other bearing systems that utilize a plastic rail. This is why the Dynamic range is the top choice for applications that require constant sheave movement.