A rotational collar is what lets a mounted item swing around a wheelchair tube and then lock where you leave it. This Therafin assembly is the collar for round tubing, supplied complete so it can go straight on.
The rotation is the point. A tray, a communication mount or a support arm can be swung clear for a transfer and brought back to the same place afterwards, which is a workable routine for a carer doing it twice a day.
It fits as a replacement where an existing collar has worn, seized or lost its clamping force.






