I have now tried it with these keys.
In principle, they are more effective than half-open Ringschlüssel.Dennoch I have the union nuts can not solve.
Problem with these keys is on the one hand, the thickness of the (openable) ring - you can not come close everywhere.
And on the other hand are the keys through the joint easy to move. As soon as one tries to use force
(Especially in awkward postures on the caliper or the brake hose holder) bends the hinge and around
you from slipping.
