These gauges have 18 leaves that swing out when you want to quickly check an angle. They're more convenient than a protractor when identifying 45° and smaller angles.

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.

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.

Measure a variety of hole diameters. These sets include gauges that use spring tension to expand the probe’s contacts inside of bores.

Inspect a variety of hole sizes with the gauges in these sets. Each has spring-loaded contacts on the probe, which expand inside holes to measure diameter.

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

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

Detect variations in a range of hole diameters and depths.

The dial on these gauges displays size deviations in real time. These gauges measure small slots and bores in precision parts, such as electronics, where even small size deviations can cause inefficiencies.

Test for size deviations across a range of hole diameters.

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.

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

Short, narrow contacts allow these calipers to take hard-to-reach measurements, such as the dimensions of internal grooves and slots.

Test a variety of tight slots and holes in precision parts, such as electronics. These sets include a gauge with a built-in LCD screen, an array of anvil sizes, and setting rings.

Check the diameter of holes with the pull of a trigger. These sets have everything you need for one-handed measurements—a pistol-grip gauge, a head, setting rings, and a stand.

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.

Measure diameters, angles, and other complex geometries—like an optical comparator—but without all the training. These gauges have an easy-to-use touch screen that guides you through taking measurements step-by-step.