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.

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.

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.

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.

Detect variations in a range of hole diameters and depths.

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.

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

Keep over two dozen different ball diameters on hand to check bore sizes or use as go/no-go gauges.

Find a hole’s ID without having to compare it against a set measurement like you do with dial bore gauges.

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.

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.

Make sure the top diameter of a chamfered hole isn’t too big or too small.

Mate your fastener and countersink perfectly for a secure hold with these Starrett gauges.

Check the top diameter of chamfered holes to make sure they’re within tolerance.

View measurements on the LCD display of these Mitutoyo gauges to quickly confirm height before you mark and cut material.

Mount to a wall for easy access, and thread your fastener into holes or onto plugs for quick and accurate size identification.

Determine threads per inch and thread pitch on nuts, bolts, and other fasteners.

Identify threads per inch on external threads and find the center of your workpiece to line up thread cutting tools.

Identify Acme threads and use as a guide while grinding and cutting Acme threads to a 29° included angle.

Determine pipe size and inner and outer diameter.

In addition to checking NPT and BSPT pipe sizes, use the two included gauges for measuring thread pitch.