The prop frame can be easily and safely attached using vertically adjustable clamping wedges.
When locked, the clamping wedges hold the frames immovably in their freely selectable vertical position on the props.
In this way, locking and unlocking the prop frames is both easy and safe.

The frame can be used for different props at the same time by changing the position of the locking element. A total of 3 positions are possible.
