The 20mm Dynamic Bearing Flip Flop Block is designed to pivot around a central fixing point, keeping the rope close to the deck, mast or boom while still allowing the block to articulate to the correct lead angle. This ensures minimal friction and precise guidance of the rope. It features a laser-cut stainless-steel body and backing plate for consistent measurements and a high-quality finish. The precision manufacturing technique used allows for maximum strength in a compact size. The 20mm sheave boasts dynamic ball bearing technology with twin rows of stainless-steel bearings on a stainless-steel rail, providing superior load-carrying capability and durability compared to other bearing systems. The body and backing plate are easily removable thanks to a clevis pin, which serves as the central pivot point for the block. This makes accessing the backing plate and installing the body in either orientation a seamless process. This versatile flip flop block is perfect for controlling lines on dinghies and keelboats, as well as pump-action spinn