Kryptonite Kryptolok Series 2 LS Bicycle U-Lock (4-Inch x 11.5-Inch) KryptoLok Series 2 LS bicycle U-Lock from Kryptonite with two keys and one "I" key, and EZ Mount Transportation mount Lock measures four 11.5 inches long by four inches wide for flexible locking 13-millimeter hardened performance steel shackle and patented deadbolt locking mechanism; pick and drill resistant disc-style cylinder Moderate-security ideal for suburban areas and quick stop lock up in urban areas Includes $1,500 anti-theft protection; Lifetime warranty protects against defects