NOTE - 5/6/16: At this time the manufacturer is unable to deliver the product. We are hoping later this year issues are resolved and we can once again offer the product for sale.Keep your trailer coupler safe from theft, even if subjected to crowbars or sledgehammers! The Proven Industries 2516 coupler lock fits most 2-5/16" couplers. It features a 1/4" hardened steel construction with a powder coat finish. It comes with an outside shield and interior slide. Both components are robotic tig welded and CNC laser cut for a precise fit. Using a simple three step system, this lock works to secure not only your coupler, but your safety chains as well. The inner slide can accommodate both heavy and low weight rated safety chains, and features alignment tabs to ensure a proper fit into the outer shield. Includes Proven Lock & keyed differently puck lock.