The fast cut Bi-Metal hole saws contain an extra cobalt HSS tooth material for enhanced heat and wear resistance, along with a new 5.5 TPI positive rake tooth design, to ensure a smoother and faster cut when compared against our previous Constant Pitch Hole Saw. Specifically designed to cut stainless steel, metals and mild steel sheet, Fast Cut Saws will also cut through wood, plastic, plaster and other materials. Recommended cutting depth - up to 13mm (1/2”) in softer materials. New tooth material with extra cobalt for enhanced heat and wear resistance - improving the product life. The 5.5 TPI positive rake tooth form provides less torque for a smoother, faster cut in all materials. Ideal for 3mm stainless steel, mild steel sheet and tubes and other materials with a thickness of up to 13mm (1/2”). Features & Benefits • 30% extra gullet volume for better material penetration • Size range: 14mm - 210mm Specifications: • Teeth per Inch (25mm): 5,5 • Teeth Type: Extra Cobalt HSS • Piece