Find the inside diameter of cylinders and rings.

Find the inside diameter of cylinders and rings.

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

Extend your micrometer's reach for measuring deep holes.

A different measuring range on each gauge makes these sets handy for checking a variety of hole sizes. Each gauge has spring-loaded contacts on the probe, which expand inside holes to measure diameter.

Versatile enough for general checks, these bore gauges have spring-loaded contacts on the end of their probe to expand inside holes.

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

Measure the diameter of small holes, grooves, and recesses.

Measure the diameter of small holes, grooves, and recesses.

Measure the inside diameter of holes and cylindrical bores, as well as identify out-of-roundness problems.

Check for sizing errors in small slots and holes. These bore gauges are often used in precision manufacturing to test electronics and small-scale prototypes.

Check a hole’s diameter and detect out-of-roundness problems.

No need for other tools to set a baseline diameter—these bore gauges have a built-in micrometer head.

Check roundness, taper, and diameter near the bottom of bores—the flat bottom on these gauges positions the anvil against the base of the hole.

Measure bore diameter directly. These gauges give you the actual diameter, unlike a dial bore gauge, which only shows the variation from a set measurement.

Whether a chamfered edge is in a screw hole or on the end of a rotary shaft, these gauges find its diameter. The calculated diameter displays on the LCD screen for quick readings.