Measure hole diameter and read it directly on an LCD display, no baseline measurement required. They measure deeper into smaller holes than inside hole micrometers. These Mitutoyo sets include handles with digital displays, changeable heads, and setting rings. Rotate the display up to 330° to see results at the angle you need. Unlike the usual two contact points, the probe has three to center the head, which means more accurate tests for out-of-roundness. To protect against bumps and corrosion, the contact points have a titanium nitride (TiN) coating. A flat-bottom anvil gives you stability to check blind holes.

An SPC data output lets you connect the gauge to a computer or data processor to monitor data and analyze trends. Zero-position memory, also known as absolute (ABS) positioning, retains the measuring position when the gauge is turned off. A zero-set button lets you start measuring at any point. For repeatable go and no-go tests, set upper and lower tolerances. A bar indicator on the display shows whether your measurement is within bounds, making test results quick to check. Alarms will sound if there are any issues, such as setting errors and low battery.

Use the included setting rings to calibrate your gauge.

Additional heads (not included) are available to measure other bore sizes.

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. This means you can reach holes at awkward angles, such as overhead. The pistol grip also gives you precise control using just your fingertips instead of your whole hand. Unlike dial bore gauges, you don’t need to set a baseline measurement before use. Rotate the LCD display up to 330° to read results at the angle you need. Rated IP54, the gauge withstands dust and splashing water.

For better accuracy, the head has a self-centering probe with three contact points instead of the usual two. The extra contact point makes it easier to sense issues with roundness, a common check in quality control tests. Zero-position memory, also known as absolute (ABS) positioning, retains the measuring position when the gauge is turned off. Connect the gauge to your computer via Bluetooth or the SPC data output to monitor and analyze data in real time.

Use the included setting rings to calibrate your gauge. They come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Check the diameter of holes with the pull of a trigger. These Starrett sets have everything you need for one-handed measurements—a pistol-grip gauge, heads for varying diameters, and setting rings. Thanks to its pistol grip, you can reach the gauge into awkward spots, such as those overhead. The pistol grip also gives you precise control using just your fingertips instead of your whole hand. Unlike dial bore gauges, you can measure right away, no baseline measurement required. You can even set upper and lower tolerances for quick go/no-go tests. The LCD display has lights and arrows to show if the hole falls within your set tolerance. Rotate the display to read results at the angle you need.

Since the gauge has three contact points, it’s more accurate than a typical bore gauge with two contact points. The probe centers itself, so it’s easier to detect issues with roundness, a common check in quality control tests. To stay accurate, the gauge has alarms to warn you about problems that could skew readings, such as a low battery, a contaminated probe, and test setting errors. Use the included setting rings to calibrate your gauge.

With a zero-set button, you can start measuring at any point. Zero-position memory, also known as absolute (ABS) positioning, retains the measuring position when the gauge is off. Connect the gauge to your computer, smartphone, or other device via Bluetooth or the SPC data output to monitor and analyze data in real time.

Measure hole diameter in dirty machine shops and the outdoors with the pull of a trigger. Rated IP67, the bore gauge in these sets is protected from dust and temporary submersion in water. Sets include everything you need to measure—a pistol-grip gauge, heads of different measuring ranges, and setting rings. Thanks to its pistol grip, you can take measurements with one hand and reach into awkward angles, such as those overhead. The pistol grip also gives you precise control using just your fingertips instead of your whole hand. The LCD display directly shows the measured diameter, so you don’t need to set a baseline like you do with a dial bore gauge.

Instead of the standard two contact points, each head in these sets has three to center the probe in holes. This improves accuracy for detecting out-of-roundness, a common check for quality control. Connect the gauge to your computer, smartphone, or other device via Bluetooth or the SPC data output to monitor and analyze data in real time.

Use the included setting rings to calibrate your gauge.