If you need to drill fiberglass for installation of locks, knobs, etc. these carbide tipped 3 wing drills with quick change shank are the way to go. Available from 3/4 to 1-7/8" in diameter.

Typically used in portable drills within the boat and RV industries these 3 wing drills will drill fiberglass without leaving a plug.

Check out our Drill Bits for Boring Machines section for more 3 wing drills and other bits typically used in drill presses and CNC boring machines.