Master Lock 109SIXSPT Keyed-Alike Armored Cable Gun Lock, 6-Pack Tested by independent laboratory to stingent AB106 requirements 0.27-inch (6.6mm) diameter, 15-inch (38cm) long armored cable with brass ends prevents scratches and 4 pin tumbler cylinder, keyed alike 6 Pack of No. 109 keyed alike 4 pin tumbler cylinder locks Usable on revolvers, pistols, rifles and shotguns Deadbolt locking mechanism can only be opened and closed with key inserted and turned