The Back Bender helps to correctly arch the back into correct posture.
The client can use it at home. The Masseurs can use it when the client is face up to gain better access to the clients sides.
It is one of those simple idea things that seem to just work.
I personally use it on occasion when seated in a chain. Its curve and spin groove encourage correct back posture and discourages sluming in the lower back region.
This back bender bends the back back into correct position.