These chain claws can be used to stop the anchor chain grinding on the bow roller when moored overnight. The claw is fi tted to the chain below the bow roller and a line is then attached from the eye of the claw to a bollard, holding the chain in place. Made from 316 grade stainless steel. 2 chain sizes. RWB5578 Suits 10 - 12mm chain. 160mm length x 95mm width.