The kryptonite kryptolok series 2 std u lock with 4 foot kryptoflex cable a versatile lock package containing u lock and a braided steel flex kryptonite kryptolok series 2 std u lock with 4 foot kryptoflex cable features versatile lock package containing u lock and a braided steel flex bicycle security for moderate to high crime areas with a standard length shackle 13 mm hardened kryptonium steel shackle patented deadbolt locking mechanism for extensiv