16mm hardened MAX Performance steel shackle resists bolt cutters and leverage attacks. New, Transit FlexFrame bracket has unique 360 degree rotation which provides the ability to micro adjust the lock angle to better fit frame's geometry. Transit Flexframe bracket has a heavy duty soft strap system which contours to shape of the bike providing constant contact, single point attachment and adjustment design allows for adjustment without removing the bracket completely. Includes 3 Stainless Steel keys 2 new I keys and one high intensity LED bulb for convenient, easy unlocking in the dark. Hardened deadbolt locking for extensive holding power. Higher security disc style cylinder.