Unique "Perko Leak Proof" slide action design keeps inside of hatches dry. The self-adjusting, ratcheting cam bar/strike permits installations with slight misalignment of components. Installs in a 2" diameter hole in mounting surfaces 1/8" - 3/4" thick with a simple, single nut. Includes 2 strikes to accommodate a variety of mounting configurations. Size 2-3/8" O.D. Color Black