Ultra high-security, five-foot bicycle chain lock with New York Disc Lock and three keys (including one lighted key) * 14-millimeter, six-sided chain links made of 3t manganese steel provide ultimate strength * New York Disc Lock with 15-millimeter hardened MAXPerformance steel shackle and higher security disc-style cylinder * Patented, oval hardened steel crossbar for extra security and hardened double deadbolt lock for holding power * Kryptonite security rating of 11 out of 12; $3750 of anti-theft protection