When Castle I have nothing to complain about. It is easy enough, now goes for about 6 months on good and and has not yet been cracked. But what the hell, is the holder. The holding does not mind. Since the lock already falling out at Cobblestone ... have long searched for a universal bracket and the only thing that has worked well was the Kryptonite FlexFrame (), the previously good fit (16mm) and holds securely.