Question: How to drill a hole in a penny?
Option 0: Spray WD-40 on to the penny, letting the rim of it hold a puddle to help keep the bit cool. Place the pennies in your carpenter's pincers then use a drill in the center. Chisel down the raised edges.
Option 1: Spray WD-40 on to the penny, and rinse it off with water to keep it cooler. Place the pennies in your carpenter's pincers then use a drill in the center. Chisel down the raised edges.
Answer: 0