●14mm Hard ended Max Performance Steel Shackle Resists Hand Tools, Bolt Cutters, and Leverage Attacks.Note: Measure your doors backset, cross bore and thickness to ensure you find the right fit. ●Interior Locking Dimensions; 4" x 11. 5" ●Key Safe Program; Kryptonite will ship your first 2 keys for free, globally, in the event you lose them. ●Anti-Theft Protection Offer; Up to $3,000 Reimbursement ●Secure Mounting Bracket; Includes versatile Flexframe-U Bracket, allowing you to carry your bike lock during transportation