The tungsten carbide hole saw is a great alternative to the traditional bi-metal hole saw. They cut faster, cleaner and last longer. Try the TCT hole saw, you will like it. Metal Drills, tungsten blades cut at high speed. Through sheet steel, iron, aluminum, copper, cast iron and especially stainless steel and other hard alloys. Metal Drills The pilot drill The spring ejects cut blanks to save time. The cutter body then cuts a clean, burr-free hole faster than traditional twist drills or hole saws. TCT cutters are the standard for electrical construction, labor transportation and general metal fabrication. The spring on the pilot drill ejects the blank. Drills With normal maintenance, the tool life is much longer than other hole cutting tools. Cost-effective sharpening allows for repeated use. Product size: 8 cm