(partial list)
stripped threads
piston position indicator
control surface travel measurements
fuel valve handle
hose clamp tightener
valve spring compressor
air powered vacuum cleaner
nut starter
cable and wire abrasion prevention
self adjusting pliers
stripped screw removal
disassembly of frozen bushings
alternator inspection aid
engine heater
broken stud solution
brake system bleeder
rivet shank removal
close quarter ratcheting screwdriver
muffler leak checks
troubleshooting relay circuits
offset screwdriver
rivet squeeze
modified cleco pliers modified needle nose pliers
universal incidence device
exhaust stud removal
rolling an edge
locating oil leaks
fuel nozzle cleaning
battery cell puller
rivet removal
woodruff key removal
overtightened oil filter
tough hose puller
nut plate installation
special wrenches
flashlight modification
cotter pin removal
nut starter
pushrod tool
simple hydraulic test rig
vacuum pump removal wrench
.....and lots more