The Evolution Mini Cutters expand on the premium quality of Evolution Cyclone Annular Cutters with a specialty design that delivers maximum performance for use on hand drills. Offering enhanced speed, quality and durability, the Evolution Mini Cutters will out perform any twist drill bit or hole saw. When drilling, each hole is cut cleanly and accurately in a fraction of the time. These cutters are ideal for sheet metal, mild steel, aluminum, plastic, HVAC, light piping, conduit, copper, brass, and stainless steel