This is a very handy tool for working with racing bodywork, seats, fairing, support brackets and engine sheet metal.
This tool works well with a cordless drill. Stepped drill penetrates with a 3/16 starter hole and then can easily be enlarged to any of 12 different size holes up to 7/8".
Chamfers holes and doesn't chip or damage fiberglass panels. Works excellently with fiberglass, plastics and light gauge metal.