Extra Large Bi-Metal holesaws are constructed of hardened, heat and abrasion-resisting high-speed steel teeth with a tough alloy body and cap. This design ensures exceptional strength, durability, and shatter resistance for user safety. Ideal for cutting wood, metal, or plastic with either a handheld drill or a drill press, they are specifically suited for cutting mild steel sheet. Features: 177mm Diameter 38mm (1-1/2") Cutting Depth Variable Pitch for a smooth cutting action Suitable for cutting any machinable metal, wood, nail-embedded wood, and plastic Fits standard 32mm 210mm arbors Brand: PTI