"Mark G." wrote in message
...
Good afternoon.

I periodically find myself working on equipment that uses slotted screws
with unusually wide, thin slots. For example, a Bolex 18-5 8mm projector
uses some screws with slots 5/16" long, but only .035" wide. A standard
mechanic's screwdriver that fits this slot is only about 3/16" wide and
will tend to damage the screw.

Any suggestions for where I might find appropriate tools?

A power screwdriver + a grinder is my suggestion. I find that a power
screwdriver most often leads to less fastener damage. A grinder allows one
to shape the bits just so.