Angle grinder. Removes fuel lines, removes rust, excess metal, reshapes metal, gets rid of unnecessary wiring harnesses, removes bolts, and more! It can even make an entire Jeep disappear.
Disclaimer: Six fires so far.
2004 Jeep Wrangler Unlimited
1997 Jeep Comanche - 4.7L Stroker, Lifted, "Restored", and soon to be supercharged.