joliveCY CY-Buity 6mm Security Scooter Bicycle Motorbike Brake Disc Safety Lock With 2Keys This anti-theft disc brake lock is specially designed for bike and motorbike. Install it to the brake blade to keep your bike safety Material:Stainless steel. Lock slot depth:approx.48mm. Lock slot width:approx.9mm. Lock diameter:approx.6mm.