Bi-Metal Sheet Metal Hole Saws from PTI are engineered for strength, durability, and shatter resistance. They feature hardened, heat and abrasion-resistant high-speed steel teeth, along with a tough alloy body and cap. Designed specifically for use with cordless power drills, these hole saws are ideal for drilling holes in a variety of materials, including electrical cabinets, steel trunking, enclosures, and panels. Features: 20mm Diameter 8 TPI Constant Tooth Pitch for smooth cutting HSS 8% Cobalt Cutting Edge for enhanced durability Ideal for cutting stainless, tool, and mild steel sheeting up to 1.6mm, plus plasterboard, wood, and thin plastics Thin Wall Design for easier cutting and longer battery life Complete Assembly with a 1/4" hex quick-change shank, eliminating the need for a separate arbor and pilot drill Internal Spring for easy slug removal Brand: PTI