Avoid ripping and wrinkling paper-thin materials as you measure. The disc-shaped ends distribute pressure over a wide area to prevent denting. Plus, the spindle extends without twisting, so it won't tear delicate parts such as foil.

To find your exact measurements, read the scales on the sleeve and thimble. These micrometers are free of electronic components that could break if dropped or short-circuit if wet. You don't have to replace any batteries, so they're always ready for the job.