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Answer:
Mark needs a drill to make a hole in the metal sheet of his appliances.
Explanation:
A power drill with a metal drill bit is the best tool for this. The metal drill bit is made to cut through hard materials like metal, making a clean and precise hole.
Using a drill will make the job easier and faster than doing it by hand. It's also important for Mark to wear safety goggles to protect his eyes from metal bits and to follow safety rules while using the drill.