1-9/16"(40mm) Heavy Duty Carbide Bi-metal Hole Cutter Industrial Grade Stainless Steel Hole Saw Tungsten carbide hole saw is a good alternative to traditional bimetallic hole saw. It cuts faster, cleaner, and lasts longer.Metal drill tungsten blades can cut steel plates, iron, aluminum, copper, cast iron, especially stainless steel and other hard alloys.Metal drill spring loaded guide tip sprays rock debris to save time. Then, the cutter body can cut a clean and burr free hole faster than the traditional Fried Dough Twists drill or hole saw.Cutting tools are the standard for electrical structures, channel engineering, and general metal manufacturing. The spring on the guide drill pops out the plug.Through normal maintenance, the tool life of drilling is much longer than that of other hole cutting tools. The low-priced sharpening can be reused.