General description The Bi-metal Hole Saw Set includes 13 hole saw blades with diameters ranging from Ø18mm to Ø75mm, along with 13 mandrels, 13 hex keys, and 13 springs, all neatly packaged in a box. This comprehensive kit is designed for drilling through various materials such as plastic, PVC, wood, fiberboard, and soft metals. Technical specifications Number of hole saw blades: 13 Diameter range: Ø18mm, Ø20mm, Ø22mm, Ø25mm, Ø28mm, Ø30mm, Ø35mm, Ø38mm, Ø45mm, Ø50mm, Ø55mm, Ø65mm, Ø75mm Maximum cutting depth/thickness: 25mm Material: M42 bi-metal saw band with high-speed carbon steel cutting part Recommended rotation speed: RPM ≤ 1000 Compatibility and accessories Compatible with bench drills, drill presses, pistol drills, and various hand drills Includes 13 mandrels, 13 hex keys, and 13 springs Usage Ideal for drilling metal pipe fittings, aluminum alloys, plastic plates, galvanized pipes, fire-fighting pipes, wood, and gypsum boards Features a non-binding sharp edge design for easy