Kryptonite's ultimate security for high theft areas- 14.5mm round 3T hardened steel links- Includes maximum security New York Disc Lock with 15mm shackle- Patented oval hardened steel crossbar with double deadbolt design- Highest security disc-style cylinder is pick and drill resistant- Siliding dustcover protects and extends cylinder life- Durable nylon cover protects bike finish from chain- 3 stainless steel keys plus Key Safe Program for replacement keys- Lifetime warranty- Anti-Theft Protection Offer: with a paid registration, registered owners can be reimbursed in the event of theft due to the opening or breaking of the lock by forceSold each, case qty 2