Final answer:
A tubing cutter is the tool used to cut tubing down to size.
Step-by-step explanation:
The tool used to cut tubing down to size is a tubing cutter. A tubing cutter is a handheld tool that uses a sharp cutting wheel to make clean cuts on tubing. It is commonly used in plumbing and electrical work, as well as in industries such as HVAC and automotive.
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