This Gas/Propane holder mounts to the side of your vehicle or trailer. For installation, drilling is required. This holder features a black powder coated 3CR12 gas bottle bracket and adjustable clamp to accommodate gas bottles with a diameter of 220mm (8.7'') up to 290mm (11.4''). The bracket is lockable with the Rack Accessory Lock / Small - by Front Runner. Supplied with installation hardware.