Dremel 121 High Speed Cutter The product is 1/4" Diameter high speed cutter, 1/8" Shank Easy to use The product is manufactured in United States Compatible with all Dremel rotary tools. A versatile, high-quality cutter made of high-grade steel for use on wood, plastic and soft metals. Ideal for shaping, hollowing, grooving, slotting, inlaying and making tapered holes in soft metals, plastics and woods especially on curved surfaces.