My kit has the following:
8-17mm box wrenches; 10, 12, 14, 17mm ratcheting wrenches; 2, 2.5, 3, 4, 5, 6mm Hex keys, 9-17 3/8 sockets; 54mm socket, small and large dikes; long 45 degree needle nose pliers, channel lock pliers, duck bill snap-ring pliers, phillips and flathead screwdrivers, hacksaw, small hammer, chisel, 15 and 17mm flare nut wrenches, crescent wrench, 6" 3/8 ratchet, 24" 1/2 extendable ratchet, 6" ratchet extension, electrical tape, teflon tape, duct tape, rescue tape, 14 gauge wire, quick steel epoxy, box cutter, latex gloves, mechanic gloves, zip ties, LED work light, and an assortment of hose clamps and spare 10, 12, and 14mm bolts.
I'm sure there are things that couldn't be accomplished with this kit. However, it has worked well for me and gotten several other vehicles back on the road in fairly remote locations.
I have found most people that have the knowledge to do there own repairs already have a kit in place and those who dont rely on others. Any tools good or bad are worthless if you dont know how to do repairs.