My
I won't use a "C" clamp on brake pistons. Harbor freight has great wood
Handscrew clamps for cheap. The wood won't pop a hole in our ceramic/composite pistons and you can apply a great amount of pressure by rotating the screws opposite of each other.
The ones I bought are solid oak and you will pay 3x more for similar at a wood working, or big box store.
Can't live with out a good floor jack and jack stands, as others have mentioned...
3/8 and 1/2 inch breaker bars.
3/8"- Inch Lb torque wrench as well as a 1/2"- Ft Lb torque wrench (clicker type). FYI to keep them calibrated longer, be sure to set them back to 0 when done. This relieves the pressure on the internal spring...
3/8 and 1/2 inch swivels.
For a wire stripper/crimper I prefer the striping part to be up front and the crimper in the handle. I have a 20 year old version
of this one from craftsman that is still going strong.
Often over looked is wood. 2x4 and 4x4 pieces, 10 -20" long, come in handy with almost every job I do. Tire chocks, jack blocks to lift higher, protection for the frame when jacking, part supports, to mention a few, and they make a great note pad...
Wire test lights, I have 2. Standard stab your finger with the sharp tip and a wire capture/clamp one handed test light (similar to the Wirehawk Circuit Tester) Cat's meow!.
Metal coat hanger. Cut and sharpened on one end to poke holes and feed wires through rubber grommets (Tape wire to the end and pull it through). No sealant needed as the grommet self seals around the wire.
Disposable finger nail files. They are sand paper on a stick! Great for tight places and small pieces.
Nice set of "wood" chisels. 1/2, 3/4 and 1". Excellent gasket scrapers.