The Combination Drill and Tap Bit Set comes with 13 pcs of SAE and Metric sizes to fulfill multiple steps in a breeze. The tools are designed to drill, tap, and countersink through various rigid materials with ease, while the deburring feature cleans the holes smoothly and bits countersinks threaded holes. In addition, its High-Speed Steel improves the cutting performance of the drill and makes it more wear-resistant, prolonging its service life. These specialized countersinking drill bits can cut through aluminum, plastic, metal and much more to complete many different types of jobs. The bits are fast, and with multiple sizes available, it ensures proper hole sizing. The 1/4 inch (6.35mm) Hex Shank has a tapered end to assure over tapping is prevented and the back taper exceeds the tap to prevent over-drilling and damage to the thread. These bits come with a storage case and are provided in both SAE and Metric sizes engraved onto each piece for easy identification. ? PROFESSIONAL AND PERSONAL USE - 13 Pieces drill tap set SAE and Metric Sizes- The tap drill bit set includes SAE and Metric sizes, which are highly versatile. Each tap drill is engraved with a label, which is convenient for choosing the size that suits you. The convenient 1/4-inch (6.35mm) hex shank has a tapered end to prevent excessive knocks. In addition, the back taper exceeds the tap to avoid over-drilling and damaging the thread. ?SUPERIOR QUALITY - High-Quality Material -Durable taps are made of high-speed steel HSS 4341, which can ensure sharp, fast execution and retain strength and efficiency. In addition, the surface is treated with a titanium alloy, which significantly improves the cutting performance of the drill, is more wear-resistant and prolongs the service life. ? PROFESSIONAL AND PERSONAL USE - 13 Pieces SAE and Metric Sizes- The product includes SAE and Metric sizes, which are highly versatile. Each tap drill is engraved with a label, which is convenient for choosing the size that suits you. The convenient 1/4-inch (6.35mm) hex shank has a tapered end to prevent excessive knocks. In addition, the back taper exceeds the tap to avoid over-drilling and damaging the thread. ?WIDE RANGE USE - Included Various sizes- Can be used to tap various threads. 6 Pieces SAE: 6-32NC, 8-32NC, 10-24NC, 10-32NC, 12-24NC, 1/4-20NC; 6 Pieces Metric-M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1.0, M8 x 1.25, M10 x 1.5; 1 piece-1/4" quick change adapter. ?WELL ORGANIZED IN THE CASE - The set comes with storage case. Swivel feature props up drill bits that securely hold them in place until ready to use. The storage case folds up neatly and is convenient to travel with to different job sites and locations. B09ZT5MBVT