"SHANK 0.094 IN; DIA 0.047IN; ENG RAVING CUTTER BIT; DESIGNED FOR PRECISION ENGRAVING, CARVING AND ROUTING WOOD, FIBERGLASS, PLASTIC, CERAMICS, JEWELRY AND SOFT METALS; USED ON DREMEL ROTARY TOOL; USES 0.094 IN COLLET; DO NOT USE ON STEEL OR OTHER HARD MATL"