Kryptonite Krypto Series 2 Mini-7 U-Lock U The Best U-locks are a sturdier and more protected option compared to a cable lock but don't offer the flexibility that a cable lock does. If you need maximum protection for your bike, you'll want to get a U-Lock. The Kryptonite Krypto Series 2 Mini-7 U-Lock features a high-security pick and drill-resistant disc-style cylinder. The Anti-Rotation Double Deadbolt shackle helps fight against twist and cut attacks. This lock includes a Transit Flexframe transportation bracket and Kryptonite Key Safe Program. Features Anti-Rotation Double Deadbolt shackle helps fight against twist and cut attacks Transit Flexframe transportation bracket allows for easy mounting to your frame12. 7mm hardened performance steel shackle keeps your bike protected Specifications Shackle Length7"U-Lock Diameter12. 7mm Shackle Width3. 25"Cable Included No Lock Style Keyed Security Rating6 out of 10Weight N/A | Kryptonite | Krypto Series 2 Mini-7 U-Lock | Blue | 3. 25 X 7