These are my three screw drivers used on chip breaker screws:
Wide Blade Screwdrivers.jpg
The top one is a cabinet maker's screwdriver that stays in a drawer on the bench with my oil stone set up. The middle one stays on a shelf near my bench and is the one most used for the purpose. It was bought at an auto supply store for an emergency repair when a radiator hose sprung a leak. The bottom one is an old Stanley that has been in my tool kit for about 50 years.
jtk