A must have for a plumber
Three things, a hacksaw, a paintbrush and a bank account with plenty of capacity. :p
Seriously though, the suggestion of the others to go and have a talk with the plumbing department of his trades school may be the way to go.
Stick to a known brand of quality tools and get fussy about where your tools are all the time.
When I was working as an installer of radio and satellite equipment, I used to pack up everything before leaving the job site and take them all home with me, no matter if I was going to be back early in the morning or not.
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