The kryptonite kryptolok s2 std d lock with 4 foot kryptoflex cable bicycle security for moderate to high level crime areas 13mm hardened kryptonium steel shackle patented deadbolt locking mechanism for extensive holding power high security disc style cylinder reinforced sleeve over crossbar and cylinder provides enhanced security protection reinforced internal housing increases resistance to twisting and leverage type attacks offset key location and overhead cam locking mechanism resists