When writing a procedure and instructing to detach something with only fingers etc. and not a tool, which would be more appropriate expression: "detach without using a tool" or "ddetach without use of a tool"? Is there any difference between these two?
Either would do, but in the context, without using a tool is better.
"I have use of a car", means that there is a car available which I may use. If I have "use of a tool" it means that there is a tool at my disposal. Perhaps it belongs to my neighbour and he has said I may borrow it whenever I choose.
I am "using a tool" means I am currently performing something with that tool.
Depending on the context "detach without use of a tool" could mean what to do if no tool is available; whereas "detach without using a tool" is clearly instructing that no tool should be used.