DIY Tip of the Day: Enlarge a Spade Bit Hole. If you’ve ever drilled a hole too small with a spade bit and wanted to redrill it to a larger diameter, you know the meaning of frustration. To get the hole larger, file the sides of the larger spade bit at a 60-degree angle. Leave the edges of the filed areas sharp so they cut as you push the bit in with your drill. Hold the drill firmly as you carefully expand the hole.
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drilling spaced holes - Google 搜尋
i don't have a use for regular tools like this on the daily but this would be really awesome for all my pens/art stuff. yeah. [DEUS X MAKR TOOL ROLL]
Drill Press Vertical Boring Guide / Guide vertical pour perceuse à colonne