What tool can you expect to be used during construction of a radio studio?

Question

Lets say the tool can be purchased at any hardware store for 20 bucks.
would it be a drill? it has to be hung when in use

Answer 1

You will need many tools. Here is a list that is pretty complete:

1. Phillips screwdriver sizes #0 and #2
2. Flat screwdriver sizes 1/3" and 1/4"
3. Drill with various sized drill bits.
4. Soldering iron, and solder
5. Needle nose pliers, regular pliers
6. Various hex wrenches
7. Wire cutters
8. Coaxial cable stripping tool for various sizes of coaxial cables
9. Ty-wrap cinch tool and cutter
10. Connector pin extraction and insertion tools for the specific connectors used in the studio.
11. Connector pin crimping tool for the specific connectors...
12. Hammer (8 oz ball peen)

A cordless screwdriver would be the one tool that cost under $20 and could be 'hung'.

That's all I can think of, right now.

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Answer 2

I would expect hundreds of tools to be used, ranging from carpentry tools to soldering irons & wire crimpers.

Your question is too obtuse to answer realistically.