This ring clamp enables you to hold rings internally in order to work on the outer face of the ring easily. Unwind the wing nut anti-clockwise to loosen the center metal taper; mount the ring on the opposing end. To secure, turn the wing nut clockwise and the taper will tighten. This expands the four wooden jaws putting pressure inside the ring and hence locking, ready to be worked on. Overall length 5-3/4".
