APPLY TO - This drill bit is well-suited for low-intensity applications and DIY projects. It can handle a variety of materials, including common steel, aluminum alloy, copper, plastics, and wood, making it perfect for daily equipment maintenance and repairs.SPECIFICATION:-Cutting Edge Diameter: 3/16"(4.763mm)-Flute Length: 52mm/2.05 inch-Total Length:83mm/3.27 inch-standard point: 135° standard point tip;QUANTITY INCLUDED - Set contains 12pcs x drill bitsADVANTAGE - The 4241 high-speed steel material provides high hardness and wear resistance. The Black and Gold finish can enhance the wear resistance and corrosion resistance, extending the lifespan of the drill bit. With a The 135° split point tip can enhance positioning accuracy. EXPLAIN - These drill bits are suitable for general metal machining and light-duty applications at low speeds. They are NOT suitable for drilling high-hardness metals such as stainless steel or heat-treated steel.