Lockdown Under Desk Holster is made of nylon with re-enforced backing for rigidity. 4.25 wide elastic holster holds handguns from compact semi-autos to full frame revolvers. Accessory/magazine elastic holster along side. Ambidextrous and includes Under Desk Holster and four mounting screws. Dimensions: 8.5 wide x 10 long x .125 thick (unloaded).