Introduction: Simple Tool to Drill Square Holes

This is a simple DIY solution to broaching odd shaped holes in metal.

Step 1: Minimum Viable Rotary Broaching Tool Using Only 4 Parts

Short vid showing the details of this simple homemade tool.

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kuyote (author)2014-06-02

very good idea, I wonder, if you turned the end of the cutter down just under the size of the drill would it help starting the cut?

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