“This is a great little set if you need to check internal holes or grooves where calipers can’t reach. It adjusts smoothly, fits tight spots perfectly, and gives accurate results once you measure across the contacts. ” -Ken R.
✅ Quick Measurement: Measuring tight or deep holes can be difficult with standard tools. This set includes 4 small hole gauges that expand to fit spaces from 1/8 inch to 1/2 inch, letting you measure even hard-to-reach spots with accuracy using a micrometer or caliper.
✅ Easy to Adjust: Each gauge has a smooth, sensitive handle that gives you better control and feel. This helps you get more reliable and repeatable results when measuring valve guides, grooves, slots, and other small internal spaces.
✅ Durable: Made from heat-treated 65 manganese steel, each tool is built to resist rust, wear, and damage, giving you years of dependable use in any workspace.
Q: How do I use this tool to measure a hole?A: Insert the small hole gauge into the hole or slot, twist the handle to expand until it touches both sides, then remove it and measure the expanded width with a caliper or micrometer.
Q: What sizes do the gauges cover?A: The set includes four sizes that measure from 1/8 inch to 1/2 inch: 1/8 to 1/5, 1/5 to 3/10, 3/10 to 2/5, and 2/5 to 1/2 inches.
Size: 1/ 2” to 1/ 8”
Item Weight: 1 lb
Material: 65 Manganese Steel
Product Dimensions: 4.09 x 3.27 x 0.47 inches
4 x Small Hole Gauge Set
1 x Fitted Case
Used it to check valve guides and it worked exactly as expected. Smooth movement and good build.
This made it easy to measure some small holes in a project where calipers couldn't fit.
Smooth handle action made a big difference in getting an accurate feel.
I used this to check bore wear in engine parts. It did the job well and feels solid.
Got into some tricky grooves without a problem. Very helpful in small workspaces.
