The tungsten carbide hole saw is a great alternative to the traditional bimetal hole saw. It cuts faster, cleaner, and lasts longer. Try the TCT hole saw blade, you'll love it. Metal Bits: Tungsten blades cut sheet steel, iron, aluminum, copper, cast iron, and especially stainless steel and other hard alloys. Metal Bit: The spring-loaded pilot bit ejects cutting debris to save time. The cutter body then cuts a clean, burr-free hole faster than twist drills or conventional hole saws. TCT hole saws are the standard for electrical construction, transportation, and general metal fabrication. The spring on the pilot bit ejects cutting debris. Drilling: With normal maintenance, the tool's life is much longer than other hole saws. Economical sharpening allows for repeated use.