Amazon.comREVIEW:Rated 11 out of 12 in Kryptonite's 12-point security comparison system, the New York Fahgettaboutit 1415 Chain Bicycle Lock with New York Disc Lock is built for extreme security needs in high crime areas. The longer, five-foot chain provides flexibility if you need to lock multiple bikes together, lock components to your bike, and/or frequently have to anchor to larger objects. Built to prevent any chance of leverage or cutting attacks, the chain is constructed with 14-millimeter, six-sided chain links made of 3t manganese steel to provide the ultimate, strength. The chain is secured to your bike with the New York Disc Lock--designed for total pick, drill, and leverage attack protection with a 15-millimeter hardened MAXPerformance steel shackle and higher security disc-style cylinder. The reinforced anti-drill/pull cylinder protection system is designed with more than one million key variations and a sliding dust cover protects and extends cylinder life. The heavy-duty chain is covered with a durable, protective nylon cover held in place with Hook-n-Loop fasteners to prevent damage to your bike finish. The lock comes with three keys, one that is lighted with a high intensity bulb for convenience after dark. In the off chance that your bike does get nabbed while locked up with the New York Fahgettaboutit, be sure to register for Kryptonite's free $3,750 anti-theft protection coverage.The Fahgettaboutit Lock comes with one lighted key for convenience after dark. Kryptonite 12-Point Security Comparison System:The Kryptonite security comparison system ranks the varying levels of security offered by their range of locks. The system is designed to help consumers choose the best lock for their needs. The 12-point system begins with (1) being simple, deterrent security and (12) being extreme security. If you live in the suburbs and have a Rottweiler next to your bike or motorcycle, a lock rated a (1) is all you may need. But, if you live in the middle of a city and you want extreme protection--a Kryptonite lock with a rating of 8 to 12 is a better choice.Kryptonite Anti-Theft Protection:Anti-theft protection from Kryptonite on Series 2 locks provides up to $3,000 dollars of replacement coverage--should your bike be stolen when using your Kryptonite Series 2 lock. In order to validate this service, you must register for anti-theft protection within 15 days of purchasing your lock. All of the information you need to register for the offer is included in the packaging.Product Description14mm six-sided chain links made of 3t HARDENED MANGANESE STEEL for ultimate strength. Durable, protective nylon cover with hook-n-loop fasteners to hold in place. Includes maximum security New York Disc Lock with 15mm MAX-PERFORMANCE STEEL SHACKLE. Patented*, oval hardened STEEL CROSSBAR for extra security. Hardened DOUBLE DEADBOLT locking for extensive holding power. HIGH SECURITY DISC-STYLE CYLINDER with reinforced anti-drill, anti-pull protection system. SLIDING DUSTCOVER protects and extends cylinder life. 3 STAINLESS STEEL KEYS - one lighted with high intensity bulb and replaceable battery. Key Safe Program.Product dimensions: 5 (150cm) chain length, 15mm shackle diameter.