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Long drilling point allow the heavy-duty self-drilling screws to go through thick/heavy steel plate up to 12 mm. It can go up to 18 mm with our special design and patented drilling point.
We have 3 ways to form No5 point tail, normal tailing/Tornado/milling point. Milling point has the fastest drilling speed and perform perfectly. Tornado point is our patented point, and the speed is close to milling point.