1/4" bit driver set, They usually have a flat blade type that fits those "shallow" slots pretty good.
These are the hollow ground type im talking about, there not on a taper like a regular screwdriver tip.
I have a few Benchtop wrenches and sockets, K-Mart pliers .
I cant resist buying them when I see em at the flea market !
Wonder if Benchtop and K-Mart brands were made by the same manufacture ?