Transit FlexFrame bracket has unique 360 degree rotation which provides the ability to micro-adjust the lock angle to better fit frame's geometry, also heavy-duty soft strap system. 1). FlexFrame fits all frame tubing from 25mm to 80mm. 2). 13mm hardened Performance Steel shackle. 3). The reinforced hardened crossbar design gives more protection for the lock internals than ever before. 4). Includes 2 new Stainless Steel "I" keys that are more ergonomic and reduce the amount of torque to keep them from bending and breaking. 5). The high security disc cylinder now includes a new anti-float feature to keep the discs from moving and readjusting when in transit.