Handle Type:-Reduced Shank Drill Bit-The reduced shank design allows the drill bit to fit into a smaller chuck, expanding its usability.-This reduced design enables compatibility with various drilling machines, particularly portable electric drills and hand-held drills. If the drill works with hard materials, use a high-power drill or special equipment such as a drill press-Reduced Shank Drill Bit can drill a variety of materials, including stainless steel, carbon steel after heat treatment, iron, aluminum alloy, copper, wood, plastic, etc., with strong adaptability, also including auto repair, modification, appliance installation repairMaterial:-The drill bit is made of M35 high-speed steel, which contains cobalt, has high molybdenum content, and features a high alloy composition. It possesses excellent red hardness and wear resistance, making it suitable for drilling various metals, including stainless steel, iron, copper, aluminum alloys, and cast iron.Surface Treatment:-The black nitriding layer formed during the nitriding process effectively resists oxidation and corrosion, making it suitable for use in harsh environments and reducing maintenance frequency, provides lubricity, while the small pore structure effectively retains coolant, enhancing the cooling effect during the cutting process and reducing wear-The oven-baked yellow surface treatment can eliminate or repair changes and damage to the material's surface.Package Content:-1 x Reduced Shank Drill Bit