Features:TCT metal hole saw kit is made of carbide, which has the characteristic of high hardness, wear resistance, good toughness, heat and corrosion. The center drill bit and spring-loaded guide ensure precision and control, suitable for cutting holes for pipes, and creating openings for cables and wiring. Special angle three-layer cutting edge design can drill fast and efficiently, providing efficient cutting performance on a variety of materials. Great to drill on a variety of materials, including stainless steel, mild steel, iron, copper, aluminum, FRP, plastic and thin brass sheets. Metal hole saw set can be installed on hand drills, cordless drill, impact drills and bench drills. This set includes 13 different sizes of hole saws, a hex key, and a storage case for each hole saw cutter, easy to organize and transport. Note: Please add coolant when drilling continuously at high speed, drilling on stainless steel, or a steel sheet thicker than 5mm. 13pcs Metal Hole Saw Kit TCT Carbide Cutters 19mm-75mm Stainless Steel. TCT metal hole saw kit is made of carbide, which has the characteristic of high hardness, wear resistance, good toughness, heat and corrosion. We are continually expanding our product selection to better serve your need.