Sizes 11/16" , 13/16", 15/16" and 1-1/16" 4 Pilot Drills, 4 ejector springs and Hex Wrench. Diamond carbide hole cutters cut up to a 1" thick material. Cuts stainless steel, steel plate, iron, mild steel, copper, aluminum, iron, cast iron and high density resin in seconds. Also cuts high density acrylic and carbon fiber. Built in ejector spring automatically expels plug. Perfect holes in record time.