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High-Speed Steel Straight Handle Twist Drill Copper and Aluminum Iron Sheet Punching 1-16mm Auger Bit
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Twist drill is a tool for drilling the round hole of the workpiece through its rotary cutting relative to the fixed axis. It is named because its chip-containing groove is spiral and shaped like twist. Spiral groove has 2 slots, 3 slots or more slots, but 2 slots are the most common. Twist drill can be held in manual and electric hand-held formula drilling tool or drilling Machine, milling machine, lathe even used on the machining center. Drill bit the material is generally high-speed tool steel or hard Alloy.
