Made of high quality material for durable and long lasting use. Ideal tooth profile with forward and backward inclination, strong penetration. High-speed steel and stainless steel hole saw drill, sheet metal reamer for stainless steel, iron, aluminum, wood and various types of pipes. Cuts quickly, precise holes in steel, stainless steel, iron, copper, brass, aluminum, fiberglass, formica and other laminates In seconds. Suitable for Stone, Tiles, Ceramics, Glass and Granite, etc processing.