These micrometers have a thimble with a constant-force mechanism, so that once the spindle contacts the surface of the measured object, it will stop tightening. This ensures repeatable measurements and prevents over-tightening. A speeder knob reduces the time it takes to open and close the micrometer.

Zero-position memory, also known as absolute (ABS) positioning, retains the measuring position when the micrometer is turned off. A zero-set button allows you to start measuring at any point.

On micrometers with a friction thimble, the thimble continues to turn with resistance when the spindle stops tightening. These micrometers have one digital display on each side, so they can be read in four different directions. They’re good for left-handed users and for measuring items that are only accessible from above.