DescriptionThis unique tool lets you cut any shape in wood, plastic, glass, ceramic, aluminum, brass, fiberglass and almost any material except hard steel. Use for enlarging and shaping holes, scroll cutting, smoothing. Cuts its own starting hole and any shape in any direction tool is moved. 1/8 inch shank fits in any rotary tool. Made of solid carbide for 30 times longer life than steel. 1/8 inch cutting diameter.