Product Description Material: TCT CarbideCutting Depth: 25mm; Shank Diameter: 10mm Size: 16mm, 22mm, 30mm, 40mm, 50mm, 60mmPackage Include: 6*TCT Carbide Hole Saw Drill Bits 1.[Premium Quality]Made of high quality TCT carbide, high quality titanium plated carbide pilot drill bit, ensuring its high hardness, rust resistance, sturdiness and durability2.[Large Size]Including 16mm/22mm/30mm/40mm/50mm/60mm, each hole cutter is individually wrapped in a plastic box and each drill bit is also oiled(prevent rust). 3. [Unique Three-Blade Design]: These TCT hole saw teeth are designed with three blades, including outer blade, middle blade and inner blade, making it sharper and more efficient, ideal for cutting hard metals; 4. [Multi-purpose Tools]: This hole saw set is applicable to bench drill, magnetic drill, pistol drill, hammer drill, etc. Perfect for stainless steel plate, square tube, iron, cast iron, wood, FRP and other general metal sheets; 5. [High Precision & Easy to Use] TCT carbide steel teeth for fast cutting of clean round holes. Suitable for hand-held electric drill, stand-mounted motor drill and ribbon-type moving magnet drill