- High Efficiency: The Combination Drill & Tap Bit Set integrates drilling, tapping, and countersinking into one tool, making it ideal for handheld drills, bench drills, and electric screwdrivers. It can simultaneously drill, tap, deburr, and countersink holes in materials such as copper, brass, aluminum, metal sheets, and plastic. This eliminates the need for frequent bit changes, saving time and boosting productivity. - Ergonomic Design: This drill bit set includes both SAE and metric sizes for versatile use. Each bit is clearly labeled for quick size selection. The ¼-inch (6.35 mm) hex shank has a tapered end to reduce impact and a back taper that exceeds the tap to prevent over-drilling and thread damage. - 12 SAE and Metric Sizes: The set includes 6 SAE sizes (6-32NC, 8-32NC, 10-24NC, 10-32NC, 12-24NC, ¼-20NC) and 6 metric sizes (M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1.0, M8 x 1.25, M10 x 1.5), along with a quick change adapter, ensuring you have the right size for various threading tasks. - Optimal Usage Tips: For best results, drill slowly and avoid excessive force to prevent damage. Use ample cutting oil to ease the drilling process and protect the tool. Focus on precision for clean results. Retract the drill bit before recutting for improved performance. For tougher metals, pre-drill a pilot hole to guide the tap. Following these tips will ensure effective use of the drill and tap set. Applications: This versatile tool is perfect for DIY enthusiasts and professionals alike. Use it for home improvement projects, automotive repairs, or metalworking tasks where precision and efficiency are key. Whether you are assembling furniture, creating custom parts, or working on plumbing fixtures, this drill and tap set simplifies your workflow.