Electric nail files measure power in terms of revolutions per minute. Low-power files top out at 10,000 rpm, medium-power files at 20,000 rpm and high-power files at 30,000-35,000 rpm.

When Mexican nail artist Zaira Vega found out she was pregnant, she took a job as a receptionist at beauty salons to make ends meet. Nails didn’t call to her in any meaningful way at the time ...