Quick change drill bit chuck, tap, self-locking connecting rod for electric drills. Quick change drill bit chuck+6pc high-speed steel composite tap for drilling and tapping integrated tap MaterialHigh speed steel (titanium coated), Made of high speed steel (HSS), high hardness and rust resistance for long service life. FunctionThese are taps with drilling function, used to drill a hole and cut new threads at the same time, you will have a smooth threading experience. 6 Size M3x0.5M4x0.7M5x0.8M6x1M8x1.25M10x1.5. There are a total of 6 pieces of taps in different sizes from M3 to M10 that you can use to tap various threads. Type60mm expansion connector+0.3-6.5mm three connector B: 60mm expansion connector+0.3-8mm three connector C: 60mm expansion connector+6 π syllable billtD: 60mm expansion connector+6 PCI titanium alloy climbing drill bits ConvenientComplete drilling, tapping, deburring and countersinking in one operation, save processing steps and time costs. Improve working efficiency. ApplicationThe taps are designed with spiral flutes and the chip cleaning process would be better. These taps are used in a machine to do tapping, generally more accurate than human. error is eliminated. Material: High speed steel Color: Natural color, titanium plated (optional) Hex Shank: 1/4" (6.35 mm) Standard: Metric Thread size: M3, M4, M5, M6, M8, M10 Pitch: 0.5 mm, 0.7 mm, 0.8 mm, 1.0 mm, 1.25 mm, 1.5 mm Post: 60mm expansion connector Used in: machine Function: drilling< /p> Quantity: 7 pieces Packing list: 1 x hexagonal handle quick change chuck 6 x high-speed steel composite tap