A must have for on-the-spot caster replacement. This unique tool can remove, measure and install casters quickly and easily with no damage to casters, chairs or your hands. Pop out any grip ring stem caster with one quick snap, loosen or tighten threaded stem casters with a simple twist, and measure stem diameters of the most common sizes, even metric. Color(s): Gray Steel; Color Family: Gray; Application: Casters; Material(s): Die Cast Steel.