The tungsten carbide hole saw is an excellent alternative to the traditional bi-metal hole saw. They cut faster, cleaner, and last longer. Metal Drill Bits Tungsten blades cut through steel plate, iron, aluminum, copper, cast iron, and most importantly, stainless steel and other hard alloys. Metal Drill Bit Spring-loaded pilot tip ejects cut slugs to save time. The cutter body then cuts a clean, burr-free hole faster than conventional twist drills or hole saws. TCT Cutters are the standard for electrical construction, transit work and general fabrication of metals. The spring on the pilot bit ejects the slug. Drilling With normal maintenance, the tool life is much longer than other hole cutting tools. Inexpensive sharpening allows for repeated use. Size: 2-1/16" (53mm) Hole Saws Unique tungsten carbide dovetail tooth and thicker sidewall for greater strength and durability Cut 40 times more holes per charge with cordless drills Cut holes in 1/10 the time compared to bi-metal hole saws Tough tungsten carbide teeth extend beyond the inner and outer walls for reduced friction and much faster cutting Large esophageal side slots for fast chip removal and quick plug removal Materials cut particle ring Quantity delivered: 1 piece