- Designed specifically for precision opening of sliding door frame holes, ideal for door frame processing and working with materials like iron, aluminum, wood, and light alloys. - This robust 13-piece nitride-coated drill bit set boasts a service life that is six times longer than standard drill bits, ensuring durability and reduced replacement costs. - Features a 1/4" hex shank, optimized for use with cordless screwdrivers, allowing for quick and easy bit changes without the need for additional tools. - Made from alloy-coated high-speed steel, these drill bits are compatible with a variety of cordless screwdrivers and drills, providing versatility for different projects. Applications: - Perfect for contractors and DIY enthusiasts tackling sliding door installations or repairs, ensuring clean and accurate hole openings. - Excellent for woodworking projects that require precise drilling in light alloys or wooden frames, enhancing the quality of the final product. - Ideal for metalworkers needing reliable drill bits for aluminum and iron applications, delivering consistent performance across various materials. With a focus on functionality and compatibility, this drill bit set is engineered to meet the demands of both professional and home projects, making it a valuable addition to any toolkit.