We set the round knobs a due to the low price for a variety of tasks. In the hold as a "hook" that do not protrude and therefore minimize the risk of injury. Therefore also suitable in the motor home. Also known as cable holder for test leads can be the round buttons are running excellent. The center bore ensures rapid assembly. The frictional clamping, which results from the shaping of the gap, is advantageous in all cases. Luggage nets can be hung quickly. Rotating an excellent stable and reasonably priced product.