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.

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.

Position these gauges snugly within your bore to measure its diameter. Spring tension pushes the gauge’s two telescoping steel contacts against the walls of your bore.

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.

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.

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.