General description This plumbers kit includes seven Bi-Metal Fast Cut holesaws, plus two arbors: A1 Standard and A10 Quick-Hitch. The Starrett KFC07021 Bi-Metal Fast Cut Plumber's Holesaw Kit is suitable for all tradesmen, installation engineers, industry generally, and the DIY enthusiast. Packed in a sturdy EVA carrying case, this kit will be an invaluable addition to any toolbox. Technical specifications Holesaw sizes: 19mm (3/4), 22mm (7/8), 29mm (1.1/8), 38mm (1.1/2), 44mm (1.3/4), 51mm (2), 57mm (2.1/4) Teeth per Inch (TPI): 5.5 Cutting Depth: 41mm (1.5/8) Body Material: Steel Teeth Type: Extra Cobalt HSS Arbor Type: Provided in kit Thread Size: 32mm 5/8 Pilot Drill: A014C Core Ejector: KA8-6 Usage Ideal for cutting through 3mm stainless steel, mild steel sheet, and tubes with a wall thickness of up to 13mm (1/2). The improved tooth material and 5.5 TPI tooth form provide enhanced heat and wear resistance, resulting in a smoother, faster cut on a wide range of