The comprehensive steel drill bits set includes 6 sizes with triple flat shank design for secure chucks grip, covering common diameters from 1 / 8 " to 1 / 2 " for functional materials penetration Ideal for contractors, craft enthusiasts, and craftsmen requiring efficient drill bits and multi materials masonry drill bits for home renovations or professional projects Professional alloy steel drill bit set delivers excellent sharpness and wear resistance for precise drilling in, glass, ceramic, and masonry without chipping edges Features U grooves design for efficient debris removal and 45 degree auto centering tip that maintains stability during high speed drilling, ensuring clean openings on fragile surfaces Perfect for bathroom installations, glasses hanging, or creating plumbing access points in porcelain tiles, glass panels, and wooden surfaces with standard electric drills, Manufacturer: Uitndvyte