Description: Material: 5/8" pin constructed heavy made of 304 stainless steel material, corrosion resistance, high-temperature resistance, durable and safe for long-term service. Design elastic rubber protective cover with non-slip texture, which is soft and elastic, not easy to tear-off, for more comfortable use. Provide the dust-proof and waterproof lock head cover effectively protects the inside of the lock cylinder from being damaged. Includes two keys for added convenience, the tubular keys making it easier to lock and unlock. Function: It locks into your trailer and keeps it secure, works to help prevent the theft of your towing hitch. Heavy duty hitch lock works for many vehicle, RV, and trailer, securely and reliably attach your tow ball mount to your tow bar.(Note: Please check the model information of your vehicle carefully before purchasing so that you can purchase a suitable product.) Specification: Material: 304 Stainless Steel Common Size: Diameter x Length 16 x 144mm/ 0.63x5.67 inch Lengthen Size: Diameter x Length 16 x 154mm/ 0.63x6.01 inch Package Includes: 1 Piece Hitch Pin Lock 2 Pieces Keys Note: 1. Please allow 1-3mm error due to manual measurement. 2. Wish you a wonderful on-line shopping