Kryptonite New York Lock Standard 16mm U-Lock Bicycle Lock with FlexFrame-U Bracket

16mm Hardended Max Performance Steel Shackle Resists Hand Tools, Bolt Cutters, and Leverage Attacks Interior Locking Dimensions; 4" x 8" 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 $4,000 Reimbursement for 1 Year Included Lifetime Warranty