Meter
Thermometer ( that does RH and WB )
Nut drivers
Screwdrivers
Service wrench
Gauges ( I prefer digital )
Flashlight
Ratchet wrenches
Pump pliers ( knipex is my favorite )
Side cutters
Wire strippers
Needle nose pliers
Adjustable wrenches
Small drill
This is what I carry for service/PM