High Quality Material - This Reduced Shank Drill Bit is crafted from M2 high-speed steel with dual gold titanium and black nitride coatings, delivering exceptional durability, sharpness, and corrosion resistance for smoother drilling performance. Metal Drill Bit for Steel with Black & Gold Finish - This reduced shank drill bit's premium gold&black dual coating enhances lubrication for smoother drilling, offering superior durability and corrosion resistance versus standard coatings. 135° Split Point - This Drill Bit for Metal prevents walking while boosting speed and durability. The optimized drill bit geometry cuts hard metals without pilot holes and clears chips for precise drilling. 3-Flat 1/2" Shank - This reduced shank drill bit features a unique 3-flat design with 1/2" diameter for secure chuck gripping during portable drilling. The drill bit for metal handles tough, high-tensile materials but requires 1/2" drill chucks. Versatile Application - This metal drill bit for steel expertly drills copper, aluminum, brass, hardwoods (oak/maple), MDF, PVC, plastics (polycarbonate, acrylic, ABS, nylon) and composites, maintaining consistent performance across all materials. COMOWARE 5/8" Reduced Shank Drill Bit, HSS M2, Black & Gold Drill Bit with 3-Flat 1/2" Shank, 135° Split Point, Metal Drills Bits for Steel/Aluminum/Iron/Plastic/Wood, for Electricians & DIY