DIY 4 facet drill bit sharpener = razor sharp awsome drill bits. V1
thingiverse
Here's the rewritten text: This is a jig for precision-sharpening drill bits to exact 4-facet perfection on a vintage-grade water wheel grindstone. Produces flawlessly symmetrical, razor-sharp drill bits with crisp, clean cuts and dead-on precision. Check out this game-changing drilling system in action: https://youtu.be/lebfuSuXeOc
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