M3 M4 M5 M6 M8 M10 6pcs Screw Tap Drill Bits HSS 4341 Blue Coated 1/4 inch Hex Shank Screw Cutting Tapping Deburring in 1 Step Thread Sprial drill Metric Taper Tapping High Speed Steel

Size: 1/4 6.35mm hex shank. Standard sizes. 6pcs Include: M30.5(53 mm), M40.7(53 mm), M50.8(56 mm), M61.0(56 mm), M81.25(58 mm), M101.5(59 mm). To meet your diversified requirements. High Quality Materials: Combination drill tap bit is made of high quality High-Speed Steel 4341. Strong hardness and good durability, which greatly improves the cutting performance of the drill, is more wear-resistant and prolongs the service life. They're sharp, and easy to use. 3 in 1 Tap Bit Set: It is suitable for drilling, tapping and cutting of light metal, aluminum, iron, thin wood board, plastic board and other materials within 5 mm. They are not suitable for drilling and tap in hard metals or thick metals. One-step processing, greatly saves processing steps and time costs, improves working efficiency. The tapered end is designed to prevent excessive impact, and the rear tapered over the tap to prevent thread damage. High Efficiency: Complete hole drilling, tapping, durable and countersinking