13mm hardened Performance steel shackle resists cutting and leverage attacksKey Features:New patent pending hardened double deadbolt design gives additional protection against twist attacksHigh security disc-style cylinder is pick and drill resistantAnti-rattle bumpers reduce noise during transportNew dust coverIncludes Transit FlexFrame-U transportation system which allows for versatile carryingProtective vinyl coating2 stainless steel keysKey Safe ProgramRated 6/10 on Kryptonites security scaleOptional ATPO - £1,000Product dimensions: 4x 9(10.2cm x 22.9cm)Product weight: 2.9 lbs (1.32 kgs)Sold Secure Bicycle Gold certified