4piece titaniumcoated countersink drill bit set made from speed steel for lasting construction and exceptional toughness. Designed for heavyduty tasks across wood, metal, and various materials with professionalgrade performance Complete size range includes four diameters: 25 mm, 510 mm, 1015 mm, and 1520 mm, providing the right tool for any countersinking job and offering a comprehensive solution for professionals and DIY enthusiasts with versatile applications Coneshaped tips for accurate centering and alignment, with enlarged spiral flutes that facilitate smooth, efficient chip removal, delivering clean, professional finishes with consistent results Wide equipment compatibility to suit table drills, milling machines, cordless drills, and drivers, enabling flexible use across different drilling projects while maintaining performance Benefits and use cases Improves screw seating and flush finishes, while reducing the risk of wood splitting and misalignment Durable construction and precision design support repeated, heavyduty use across materials Practical applications Woodworking and cabinetry: countersinking hinges, hardware, and screws for a flush, professional look Metal fabrication: countersinking and deburring holes in aluminum or steel components DIY projects: plastic or composite parts requiring clean, accurate countersinks and chamfers