Features: • High-speed cobalt steel teeth are electron beam welded to a steel body. This process enables teeth to cut faster and stay sharper than standard teeth . • High alloy steel body is shatter resistant for superior durability. • Bi-metal design bonds M3 cutting edge to fatigue resistant backer. • Positive rake teeth offer better chip clearance. • 4 / 6 variable pitch reduces vibration and heat generation for smooth cutting. • Cutting depth 1-1/2" . • Cuts holes in wood, plywood, plastic, fiberboard, or any machinable metal, including: nail-embedded wood, pipe, stainless steel, etc.