In appliance repair with a 1/4 and 5/16 nut drivers, Phillips, and needle nose. I could fix probably 3/4 of the problems I saw. The next requirement was a multibit screwdriver with Torx security bits needed for microwaves. I never carried a tool box in the house, could repair most things with those 4 tools and sometimes a VOM meter. I did use a proximity voltage tester on just about every job to make sure it was safe to touch the appliance after finding stoves, refrigerators, stoves, dryers, cooktops, and washers that were wired with cabinet hot, hot not grounded as they should be. I even found a washer with power cord burned off that had welded itself to the dryer because the dryer was misswired.