It is a quality product that you can understand by the sense that it is transmitted to the hand at the moment of rotation. It was a satisfying work result keeping extremely stable quality during work. It can be imagined from the product specification of the manufacturer's website. A hand grip that allows more stable work with one hand or both hands is an option.
It is mainly woodworking, it connects to the hand grinder and uses it for grinding / polishing using H & H's sponge file and polygons & drums of sticky. Experience using the flexible driver's bit extension shaft of company A previously predicted a thing with a large rotational resistance, but in spite of its long rotation, it is very smooth rotation, effectively transmitting the turning power of the hand grinder It is. The thickness of the hand grip is also thin and can be put through the narrow gap after construction, which is very convenient. I feel it is almost unnecessary because the rotation is smooth, but I fix it to a handmade plate just in case so that the hand grinder does not go out of control.