I have noticed that to get a repair done you need so much tools, fluids, and parts to get a repair done. I noticed that too with mechanics. You need hex wrench, a screw driver, pliers, cutter, oil, detergent, glue to get a repair done.
You must also keep old parts for spare screws, washer, wires so that you can complete a repair
After a repair is completed the number of tools and stuff you employed for the repair does not show.
(Answer: there are a number of steps you need to complete-- from removal of old parts, cleaning, deburring, sand papering, and reinstallation to get the job done. You need a different tool for each of the step that is why)
