Using this Cobra Kai door key is easy. Just take it to a professional key - cutting service and they'll cut it according to your lock's requirements. Remember, this key is designed for UL2, UL054, UL1, or UL050 profile locks, so make sure your lock matches. To keep it in good condition, avoid exposing it to harsh chemicals or extreme temperatures. If it gets dirty, you can gently wipe it with a soft, dry cloth.