A proverb meaning that things have value depending on how they are used; with the right use, even something simple can be useful.
古い机でも、物は使いようで十分役に立つ。
Even an old desk can be perfectly useful depending on how you use it.
この道具は、物は使いようによってはプロ並みの仕事ができる。
This tool, if used properly, can do professional-level work.
物は使いようと言っても、正しい使い方を知らないと危ない。
Although 'things depend on how you use them', if you don't know the correct way to use them they can be dangerous.