A tapered end on hex shank can prevent excessive knocks; Back taper exceeds the tap to prevent over-drilling and damage to the thread. Drilling speed, chip back quickly, prevent sticking.
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1/4 inch Hex Shank fits into all power tools more easily and securely, especially for tapping machine. These taps are used on a machine to do the tapping, generally more accurate because human error is eliminated.
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They are taps with drilling function, used to drill a hole and cut new threads at the same time, you will have a smooth tapping experience with them.
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