Simple Tool to Drill Square Holes

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

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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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    5 years ago on Introduction

    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?