FITS MOST LOCKS: make sure to check if you need a Kwikset, Schlage, or another door lock brand before completing your purchase - must be cut by a professional to make a copy or replacement of your existing key HIDE IT: hide a spare key so you never get locked out - under the mail box, utility box, air conditioner unit or somewhere on your car where no-one will ever see it SILENCE YOUR KEYS: connect multiple keys together to form a silent keychain and simplify your keys - you can even eliminate the key ring if you really wanted to MATERIAL: anodized aluminum is lightweight and rust resistant IDENTIFY YOUR KEYS: four color options allows you to quickly identify keys by color - available in black, blue, red or purple