I carry a lot more than the average joe, so take from this what you will...
But for tools specifically I carry (in a
Blue Ridge Overland Gear tool bag):
- Sockets
- 7-22mm short and deep, 24mm deep
- 3/8" ratchet
- 1/4" and 1/2" adapters
- wobbles
- extensions
- 14" 1/2" breaker bar
- Wrenches/Pliers
- 8-19mm adjustable head gear wrenches
- Small and large adjustable wrenches
- Vice Grips
- Needle nose, flat nose, slip joint, and combination pliers
- Screwdrivers/etc
- Straight, 45°, 90° picks
- PH0-PH3 screwdrivers
- 1/8", 3/16", 1/4" flat head screwdrivers
- Torx/Hex
- 2mm-6mm hex keys and sockets
- T10-T50 security torx (keys and sockets)
- T27 Torx Plus (keys and sockets)
- Electrical
- Replacement fuses for anything I've added to the vehicle or touched
- ATC, Mini ATC, MIDI, ZCase, MEGA, MRBF
- About 6 feet of 14AWG wire
- Strippers/Crimpers
- 10-12AWG, 14-16AWG, 18-20AWG heat shrink butt splice, fork, male/female blade connectors
- Multimeter
- Misc
- Small hammer
- Gorilla tape
- zipe ties
- flush cutters
- silver and black sharpies
- magnetic retrieval tool
- magnetic and adjustable light
Beyond that I also carry an ARB plug kit, Colby emergency valve stems, Glue Tread sidewall repair kit, windshield repair kit, fix a flat, etc
Also,
here's an extensive thread with tool kits