Trimax Fixed Coupler Lock 7/8in 7/8in. Trimax Locks exclusive internal O-ring and watertight cap seal out moisture The round key wont bend or break like flat keys and are impossible to pick Triple Plated Chrome Finish Fits all standard 1/2" to 7/8" span narrow lever couplers Package Contents: Trimax Fixed Coupler Lock 7/8in Trimax TC1: Fixed Coupler Lock 7/8in 7/8in