Set includes one dial head that fits onto three gauge bodies. Use them to measure the inside diameter of holes and cylindrical bores.

Spring-loaded contacts on the end of the probe expand inside holes, making these bore gauges versatile enough for general checks.

With an LCD screen, these micrometers make it easy to read inside diameter measurements taken from cylinders and rings.

Reach into bores to measure the precise size and location of grooves.

These calipers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

These sets come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy.