Now you can have all of the protection you need conveniently carried on your keychain! This single-hole knuckle accessory is made from 100% pure brass, and comes complete with a drilled hole to add onto your keys. Never feel unsafe again with defense as close by as this keychain accessory that packs a whollop! Overall Length: 2.3 Inches, Material: 100% Pure Brass, Weight: 51 g/.18 lb