SIZING and INSTALLATION GUIDE: Please check the lock strike distance and door thickness before purchasing to a perfect fit. Fits standard 3 or 4-inch diameter mounting holes. Installation is simple and straightforward, featuring a 90-degree turn lock and key for removal in the unlocked position. CONSTRUCTION: Our heavy-duty tool box locks are made of premium zinc alloy for durability. With rust-proof and waterproof chrome plating, these locks withstand harsh weather conditions, ensuring years of reliable protection of your valuables. VERSATILE APPLICATIONS: Our locks accommodate 1-1 or 8-inch cylinder depths. Perfect for a variety of applications such as RVs, trucks, utility doors, tool boxes, and more. Effectively protect personal or professional equipment. ENHANCED SECURITY: Each set of locks features unique keys to maximize security. All locks use the same key for ease of use, providing a seamless access solution. Colour:Black Material:Zinc Alloy Size:1-1 or 8-Inch Package Contents: 1 x Cam Lock Set(includ 2 x Cam lock, 4 x Key, 2 x Straight piece) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.