This item is the clamp block for the OneWay Bowl Steady that fits General lathes. It is NOT the complete OneWay Bowl Steady.The OneWay Bowl Steady Rest is designed to reduce vibration at the rim of a bowl or platter, thus making turning safer and easier. Even the best lathes cannot stop vibration inherent in the wood, caused by wood flexing. The Bowl Steady's neoprene, ball-bearing wheels reduce vibration, allowing smoother finished projects. Adjustment is easy, just align with the lathe's center, squeeze the scissors-like tension arms and tighten down on the wing-nut. Used with the Bowl Steady Rest, Spindle Steady Rest, and Easy-Core Coring System.