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So maybe it’s not called drilling so much as it’s called broaching but it’s cool none the less! We’ve all encountered a situation where we needed a square hole for one reason or another. Sure, you could drill a regular hole then spend forever and a day filing it down to the size you need but it’s always better to use a more efficient method. That’s where this broaching method comes into play.

How to “Drill” Square Holes at Your Home Garage
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