Unfortunately, this support has nevertheless 2 problems ... therefore penalized.
1) For thin rods or tubes of Distanzgummi not enough ... here you have to be best with a piece of leather belt underneath it appeals.
The same applies to the mounting of the lamp.
2) The mounting screw rusts very quickly; there is no washer under the screw head; the turning knob is made of plastic and breaks easily.
Top screw exchange here against a stainless steel screw with washer and lock nut.
Then also the rain this part no longer harm.
Oh ... and please the screw will not tighten to Dolle. That part stuck on a piece of leather belt really fast and reliable.