SOLUTION

The length of a file is measured from the tip to the heel.

• Tip: This is the pointed end of the file that is used for cutting or shaping material.
• Heel: This is the end of the file that is closest to the handle, where the tang is located.

Measuring from the tip to the heel gives a clear indication of the working length of the file, which is important for selecting the right size for specific tasks. This measurement helps users understand how much surface area they can cover while filing.