Double bolted 13mm hardened steel shackle. Extra resistance to crop & pull attack methods. Tough steel lock body. Added protection against brutal attack methods. Anti pick 5 pin locking mechanism & dimple key. Extra resistance to picking & manipulation attack methods. Reversible key. For ease of use even in the dark. Protective cylinder weather guard. Protects the cylinder from dirt & moisture. Versatile quick release mounting bracket. Allows lock to be fixed to the bike frame or seat post for easy transportation. 10 year guarantee Vertical Shackle Clearance: 260mm. Shackle Diameter: 13mm. Kasp Security Rating: 11 (Rating scale 1 15).