After careful examination and product comparisons I chose a holder, which is located in the middle price segment. Important and very practical this is the telescopic function. The description corresponds to the goods and this is recommended for the price. Easy to assemble and mount projector. Adjustment is easy and the individual screws with lock washers that setting is retained. No slipping even with repeated change of connections. Material makes a stable impression and thanks to the six-quencher for ceiling mounting ensprechend stable. Who wants to carry many cables in the inner tube, while it is then more closely -> still Kauftipp