Pontoon boat gate latch works on both left and right hinged gates and prevents them from swinging inward, sold individually. Fits 1", 1⅛”, & 1 ¼" square tube pontoon fence railing. Nylon molded plastic will not break, has stop for outside of railing so gate will not go past parallel, quarter turn to lock/unlock and open/close the gate. Works with our standard aluminum piano hinge.