General description These 6pcs HSS TCT Chainsaw Core Drill Bits are made from high-quality tungsten carbide and alloy steel, ensuring high hardness, rust-proof durability, and sturdiness. The set includes various bore diameters ranging from 22mm to 65mm, making it versatile for different drilling needs. Technical specifications Material: Tungsten carbide and alloy steel Bore Diameter: 22mm/0.86", 30mm/1.18", 35mm/1.38", 45mm/1.77", 50mm/1.97", 65mm/2.56" Total Length: Approx. 68mm/2.68" Shank Diameter: Approx. 9mm/0.35" Installation Should be installed in an electric drill for use. Can also be attached to a hand drill. Usage Ideal for drilling holes in stainless steel plates (up to 3mm thick) and iron plates (less than 10mm thick). Suitable for machining aluminum alloy metal holes. Perfect for installing locks and knobs in doors and cabinets, or drilling larger diameter holes through desks. Can be used for cutting holes in thick steel plates, cast iron, non-standard angle iron, and