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 (approx 2.95-2.97mm) and one 4mm drill bit (approx 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.  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.