Item Type: Combination Drill Tap Bit Material: Cobalt high speed steel Uses: Suitable for drilling and tapping aluminum, wood, copper, plastic, and iron plates Shank Type: 1/4in Hex Shank Specifications: M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1, M8 x 1.25, M10 x 1.5 Applicable Machines: Tapping machine, handheld tapping machine, drilling and tapping machine, machining center 1Cobalt High Speed Steel: Made of cobalt high speed steel, these tapping bits have good wear resistance and cutting performance. 23 in 1 Design: With the functions of drilling, tapping and chamfering, it can effectively improve work efficiency. 3With 1/4in Hex Shank: These tap bits are equipped with standard 1/4in hex shank for tighter clamping and easy operation. 4Multiple Specifications: With M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1, M8 x 1.25, M10 x 1.5 specifications, to meet a variety of needs. 5For Drilling and Tapping Work: Tap bits are suitable for drilling and tapping aluminum, wood, copper, plastic, and iron plates, etc.1. According to different situations and usage scenarios, choose matching taps. 2. Choose the correct drill bit diameter. If the bottom hole is too small, the part of taps that needs to be cut will increase, which will increase the risk of tap breakage.6 x Bits