FITMENT: This listing is for a steel small wheel holder for 2x72’’ belt grinders & a set of 5 small wheels for knife grinders knife making. It attaches to a tooling arm with a 1/2-13 bolt & a 3/8-16 bolt. Narrow and corner areas are the ideal solution for recovering and knife grips FEATURES: 1) This set contains a set of 5 small wheels. It consists of 5 popular diameters: 1/2", 5/8", 3/4", 7/8" & 1". The small wheels are made from 1018 steel, durable enough to grind finger grooves precisely .