Bike Disk Brake Lock is made from a solid cast of steel, iron and zinc alloy, this compact anti theft device packs a punch. A hardened steel locking pin makes this device almost impossible to drill, saw, cut or hammer off. The thieves startled seeing a light turn on run out of your garage leaving your bike unharmed. This stylish compact theft deterrent is simple and can be stored almost anywhere, even your pocket until it is needed for duty. You are not going to find a more economical yet effective tool on the market that compares to the security and peace of mind this little device will add to your bike.