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Окут 6542 High-Speed Steel Twist Drill Bit For Drilling Steel And Stainless Steel Special Super-Hard Hand Electric Drill Bit

About twist drill 1. Use a hand electric drill to drill the twist drill and process the material at a vertical angle of 90° 2. If the hole is larger than 60mm, first use a 3.2~4mm twist drill to drill the reserved hole and then use a large drill bit to enlarge the hole. 3. The electric drill chuck must…