I was so pleased to find that I could replace the mounting bracket for my decades-old Kryptonite U-lock. It's refreshing to find a company that provides support for their products for such a long time. The original bracket had a hard plastic restraining strap that broke when shaken to bits while I was riding over some of the roughest, most neglected pavement in the city. (I'm lucky to still have my teeth after that ride.) The only problem I have with this new bracket is that the "soft strap system" did not stay in place on my seat tube, which is tapered. The installation instructions warn against overtightening lest the tube be crushed, so I could not prevent the bracket from sliding downward and then rotating sideways. I've relocated the bracket to the down tube, which is not tapered, and it has stayed in place. I had to change the shackle on my lock, using one supplied in the kit. That was very simple and easy to do. Very happy with this purchase.