Flzosper 13Pcs Sae/Metric Titanium Combination Drill Tap Bit, Countersinking Easy-to-Read Labels Quick Change Adapter One-Click Processing Tips: ??Various sizes?-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. ??Superior Quality?-High speed steel provide good wear resistance and cutting performance. Titanium coating provide longer bit life by resisting heat buildup. ??Ergonomic design?-Each tap drill is engraved with a label, which is convenient for you to choose the size that suits you. The convenient OE-inch (6.35mm) hex shank has a tapered end to prevent excessive knocks. Back taper exceeds the tap to prevent over-drilling and damage to the thread. ??High Efficiency?-1/4 inch hex shank fit into most power tools, such as electric drill, bench drill, drill press and Tapping machine. ??Widely Application?-Taps suitable for drilling, tapping, deburring on wood, plastic, iron, aluminum, copper, soft metal, etc.