Krytonite`s lightest weight U-lock option at 730 grams 39% lighter than the Evolution Mini-5 Krytonite`s lightest weight U-lock option at 730 grams 39% lighter than the Evolution Mini-5 11mm hardened New Max-performance steel shackle material allows reduction of shackle diameter while maintaining the performance standards of the Evolution Mini-5, Mini-7 & Mini-9* New patent pending Bentfoot double deadbolt design Higher security disc-style cylinder is pick and drill resistant Reinforced cuff over crossbar and cylinder for extra security 3 Stainless Steel keys - including new key design and one LED replaceable key fob