Keep you pool secure with the Ocean Blue Cover Lock Jr.. The Ocean Blue Cover Lock Jr. features a two-piece design that’s been engineered to form a positive interlock between the pool's top rails and the pool cover. The male portion of the cover lock JRs snap onto the pool cover’s top rails while the female side snaps over the cover onto the male parts. This product features a superior grip that will hold the cover in place more securely than other straps or clips.