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Gyros Size R Premium Industrial Grade High Speed Steel Black Oxide Drill Bit (12-Pack) 45-41098 - The Home Depot
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Size R Type 510 HSS, 118 Degree Point, Taper Shank Drill Bit - Black Oxide Flutes, Norseman Drill #15870 | AFT Fasteners
![In case anyone doesn't know this(I certainly didn't), drill bits for glass work pretty well drilling through hardened steel. More info in comments. : r /Blacksmith In case anyone doesn't know this(I certainly didn't), drill bits for glass work pretty well drilling through hardened steel. More info in comments. : r /Blacksmith](https://i.redd.it/yf6um2g060r91.jpg)
In case anyone doesn't know this(I certainly didn't), drill bits for glass work pretty well drilling through hardened steel. More info in comments. : r /Blacksmith
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