The Stack-On Pistol/Ammo Steel Cabinet includes two removable shelves and a foam padded bottom to help you organize and reduce risk of scratches. The Stack-On Gun Safe has pre-drilled mounting holes to allow for easy attachment to the floor, ceiling, wall or other gun cabinet. This is a California-approved safety device that meets the requirements of the California Penal Code Section 12088 and the regulations issued following. The locking mechanism passes through steel door and is secured behind the steel door frame for added security. The Stack-On Steel Gun Safe is fully lockable with a key-coded, double-bitted lock. Specifications for Stack-On Pistol/Ammo Steel Cabinet w/ 2 Removable Shelves: Manufacturer: Stack-On Lock Type: Key Finish: Black Fire Resistant: Yes Size: Medium Height: 18 in Width: 21 in Depth/Thickness: 10 in Weight: 31 lb Included Accessories: Fastening Hardware Condition: New Features of Stack-On Pistol and Ammo Safe: California approved firearms safety device that meets the requirements of California Penal Code Section 12088 and the regulations issued thereunder. Locking mechanism passes through steel door and is secured behind the steel door frame for added security. Units are fully lockable with key coded, double-bitted lock. Includes 2 removable shelves and foam padded bottom. Pre-drilled mounting holes allow for easy attachment to floor, ceiling, wall or other Stack-On pre-assembled gun cabinets. Both the GCG-900 and GCB-900 fit on top of all standard pre-assembled Security Plus Gun Cabinets. Not recommended for use with Stack-On 10 Gun Security Cabinet or 8 Gun RTA Cabinet. The GC-500 would be a better fit for the dimensions of these security cabinets. Package Contents: Stack-On Pistol/Ammo Steel Cabinet w/ 2 Removable Shelves