Kryptonite Kryptolok Combo U-Lock Description: The Kryptonite Kryptolok Combo U-Lock presents a moderate security option for quick-trips spent away from your bicycle. Opening and closing the Kryptolock Combo U-Lock requires the quick input of 4-digits that can be reset when needed. Features: Combination-dial entry U-lock with convenient mounting bracket Hardened high-grade carbon alloy steel shackle defends adequetly against brute foce attacks 4-digit resettable combination can be changed to refresh security Bent Foot design locks affirmatively, for confident shackling Includes frame-mounting bracket