The KryptoLok Series 2 STD U-lock is like a tough nut: you just can't crack it. Thanks to the 13mm hardened Performance steel shackle that resists cutting and leverage attacks, you get peace of mind while you run into the grocery store or lock up outside the coffee shop. Make sure your wheels are secure too when you loop the included 4-foot flex cable through them, and secure it all to the pick- and drill-resistant disc-style cylinder. You can also take advantage of the Transit Flex Frame bracket for plenty of convenient mounting options. The KryptoLok series 2 STD U-lock is 4 x 9-inches and has an anti-theft protection offer.