What is Reddit's opinion ofQWORK Countersink Drill Bits Center Punch Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute Countersink 90 Degree Center Punch Tool Sets for Wood Quick Change Bit 6mm-19mm?
Machinist here- buy a short 90 degree countersink tool something like this and rotate it by hand in the hole.
Don't try the deburring tool with the angled hole through them. Those don't work well for hand deburring.
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QWORK Countersink Drill Bit...
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