The MasterLock 8195 Black High Security U-Bar offers maximum security with its hardened steel shackles. The disc cylinder also provides a strong level of resistance to attack and prying, and has a dust cover to protect the lock against the elements. All Master Lock bike locks with locking mechanism have a Lifetime Warranty against mechanical failure. Sold Secure Bicycle Gold certified. This high level of quality is recognised by the main European testing agencies. Specification Height: 210mm.Clearance: 110mm.Diameter: 13mm.