Review on 🔧 Grizzly Repairman's Taper Reamer H5890 by Jake Pavelko

This is the easiest and safest way to enlarge the holes in your guitar's headstock. It takes longer than a drill press but is a lot less risky. I nearly broke the Strat's headstock with a hand drill. This tool slowly and gradually widens the opening of the headstock. Just make sure you drill out both the front and back so everything is even. Depending on the thickness of your headstock, you will need a round file to level the middle section. I will note that the description says it goes up to 5/8 inch. However, I would say the limit of this sweep is about 1/2 inch.