These quality drill bits are sized for drilling Polymer80 and other Glock Gen 3 style frames for their pins. This package includes one 3mm drill bit (approximately 2.95-2.97mm) and one 4mm drill bit (approximately 3.95-3.96mm).
We have a blog post where you can read more if you are interested – click here.
They are M35 high speed steel bits with 135 degree point and a straight shank. M35 tool steel has 5% cobalt added to improve hot hardness and wear resistance.
The color may either be silver-ish or black depending on where I source them.
ALWAYS WEAR EYE PROTECTION! Buyer is responsible for compliance with all applicable laws and regulations.
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