Drill Tap Set With Quick-Change Adapter Of 13Pcs, 6 Sae Sizes: 6-32Nc To Drill, Tap, Countersink 3 in 1: Our combination drill and tap set integrates drilling, tapping, and countersinking in one drill bit, allowing users to effortlessly complete 2 or 3 tasks without frequent changing drill bits, significantly saving time. Compatible with various electric drills, including handheld, benchtop, and electric screwdrivers Multiple sizes: This tap set includes 12 SAE and metric sizes, using our drill and tap set is highly versatile, including 6 SAE sizes: 6-32NC, 8-32NC, 10-24NC, 10-32NC, 12-24NC, 1/4"-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, each tap drill bit clearly marked for quick selection Convenient and Efficient: Equipped with a 1/4-inch hex quick-change adapter for easy drill bit replacement. The titanium-coated surface enhances cutting performance, providing durability and longevity. Neatly stored in a marked organizer, facilitating precise selection and orderly storage Wide Applications for Industrial and DIY: Designed for metalworking, made from high-speed steel for durability and accuracy. Suitable for materials up to 1/4 inch thick, including thin metal sheets, aluminum, wood, and plastic. The convenient OE-inch quick-change hex shank features a tapered end to prevent excessive impact and designed to avoid over-drilling and damaging threads User Tips: For optimal results, remember: 1) Drill slowly and avoid excessive force; 2) Use ample cutting oil; 3) Take time for precision work; 4) Backtrack slightly before re-cutting for better results; 5) Pre-drill a guide hole when working with harder metals. These tips ensure efficient use and enhance your overall experience with the product