13mm hardened Performance steel shackle resists cutting and leverage attacks New patent pending hardened double deadbolt design gives additional protection against twist attacks High security disc-style cylinder is pick and drill resistant Anti-rattle bumpers reduce noise during transport New dust cover Includes Transit FlexFrame-U transportation system which allows for versatile carrying Protective vinyl coating 2 stainless steel keys Key Safe Program Rated 6/10 on Kryptonite’s security scale Optional ATPO - £1,000 Product dimensions: 3.25” x 7” (8.2cm x 17.8cm) Product weight: 2.5 lbs (1.13 kgs) Sold Secure Bicycle Gold certified