Self Defense Weapon Hot Pink Cat Keychain Knuckles. The eyes of the cat become finger holes and the ears become spikes when clutched in your hand to create an excellent means of surprise-defense against an attacker. The finished stainless aluminum charm includes a stainless ring and clasp for attaching keys. This keychain looks non-threatening, is easy to carry, and will provide you with peace of mind! Overall Size: 3.14 Inches, Finger Hole: 0.75 Inches, Color: Hot Pink.