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I need to put up some shelves in my bedroom. The house was built in the late 60s and someone suggested I get Stud Finder to find where the wooden studs are. The wall they they are going on is room dividing wall and its not brick. Can anyone suggest a good Budget Stud Finder? Thanks :)

I need to put up some shelves in my bedroom. The house was built in the late 60s and someone suggested I get Stud Finder to find where the wooden studs are. The wall they they are going on is room dividing wall and its not brick. Can anyone suggest a good Budget Stud Finder? Thanks :)