Guitar cracked round patch drill
This drill can produce round patches to repair cracks on the panels, back panels and side panels of various musical instruments such as guitars. Note that it needs to be used with a bench drill. It is not recommended to use a hand drill to make round patches. It is not recommended to drill harder woods such as mahogany and ebony, as this will easily wear out the blade

Note that it needs to be sealed and put back into the knife box after each use to prevent rust