7Pcs Combination Drill & Tap Bit Metric M3 M4 M5 M6 M8 M10 Thread Ti-Coated Taps

Thread Size: Metric Size: M3 x 0.5 M3 x 0.5 M4 x 0.7 M5 x 0.8 M6 x 1.0 M8 x 1.25 M10 x 1.5 Hex Shank Size: 1/4" Material: High Speed Steel 4341 Finish: Titanium Coated 7pcs x Combination Drill and Tap Bit The 3-in-1 combination drill and tap bit set can complete hole drilling, tapping, and countersinking. Three processes in one, one-step operation, greatly saving processing steps, improving work efficiency, and providing accurate processing results. Metric combination tap drill bit is used to create threaded holes, great for situations where both drilling and tapping are required. Can process both through holes and blind holes. Suitable for aluminum, mould steel, stainless steel, bronze, hard plastics, etc.. Self-centering point, do not need assistant center drilling or center punching. Quick change 1/4-inch hex shank can be used on power tools more easily and securely. A tapered end on hex shank can prevent excessive tapping. It exceeds the tap to prevent thread breakage from over-drilling. HSS4341 thread taps offer standard hardness, good wear resistance and heat resistance for general purpose threading applications, suitable for tapping softer materials or standard machining operations. Titanium coating provides excellent corrosion resistance, and reduces the coefficient of friction for smoother tapping. Works with drilling machines, tapping machines, CNC and milling machines. Use with tapping oil to get higher quality threads and more durable taps. Machine taps are suggested to be used with tap collets with overload protection. Tips: The torque caused by too fast feed speed is too large, which can easily cause the tap to break. Taps are prone to chipping or breaking due to speed overload or non-vertical tapping.