With a calibration certificate traceable to NIST that says they've passed a test for accuracy, you can trust these gauges to confirm if your object's outer diameter is within tolerance. They're also known as snap gauges because they snap onto rods, shafts, and other cylindrical objects. To maintain their accuracy over time, they have a hardened steel frame and spindle that withstands flexing and temperature changes.

Indicators—Attach variance indicators to measure the difference between your part’s actual diameter and the expected diameter. They also come with a calibration certificate traceable to NIST that states they’ve passed a test for accuracy.

Similar in style to a hand truck, this scale tilts back on two rubber wheels to move. The tare function lets you reset the scale to zero after placing a container on the platform.

Roll this scale wherever you need to weigh. It is NTEP approved for use with products sold by weight. It has a 9-pin RS-232 serial port to connect to your PC with a data cord (sold separately). The tare function lets you reset the scale to zero after placing a container on the platform. Scale operates on the included AC adapter or batteries (not included).

Confirm parts are within tolerance without twisting the thimble each time. These micrometers don't need batteries, so they're always ready for the job.