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In this video, I make an adjustable drill bit. I start by using the metal I cut from the M12 bolt. Then I am cutting a Spade Drill Bit. Then I combine the two.
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Did you see this ? Countersink Drill Bit making
In this video, I make a simple doweling jig. Very easy building from scrap wood. It is a self centering tool. With drill is difficult to center. That is why I chose to sti