Features and Benefits:•Perfect for cutting v-grooves into plastic prior to welding.•Fits Dremel tools.Extremely versitile cutting burr for getting a tight v-groove in urethane and other plastics in preparation for plastic welding. This high-quality, versatile cutter made from high-grade steel, is ideal for shaping, hollowing, grooving, slotting, inlaying and making tapered holes in soft metals, plastics and wood, especially on curved surfaces. 1/8" diameter shank for electric die grinders (Dremel).