These locks are awesome. They are a high durable material that Master Locks make all their other locks out of. It fit my Ak, my SKS, and my Mosin Nagant. VERY sturdy locks. I am sure they will fit any other gun out there as well, besides a lever action. I recommend these to anyone that is broke like me and can't get a gun safe, or simply wants to be more secure. Accidents suck, but they are always preventable. You are not getting these bad boys off without the key or harming the firearm. They come with 6 keys that fit all 3 locks. They have a nice rubber padding inside and on the rim to protect from scratching your beauties. They are easy to slip on and off (with the key of course) and they are adjustable by width. There are little teeth on the bolt that ticks as you put it on, allowing you to make a very tight (or loose) fit on your firearm. Last but not least, the keys. The keys are little gold keys with real teeth on them just like a real key. The keys are not from a crappy material either. If you are considering buying gun locks, try these out. I am sure you'll be happy.