The whole thing is very shaky. The worst part of the rotary handle, with which one attracts the bracket to the bicycle: a relatively soft plastic, is to use them as a wrench. This thing has rough edges, the first with each revolution of the aluminum rod hakeln.Beim attempt I have too tight and they damaged obviously when buckling down the bracket. Now it can be opened only with very great difficulty again and even with special pliers. (That's nice if you do not get his bike down on holiday at the beginning of a cycle tour :-() In the second I went much more cautious about plants so that hardly occurred these problems: therefore still the second star
