Thread Checker, Rustproof Nut and Bolt Thread Checker, Wall-Mountable Bolt Size Finder Tool, 15 SAE & 15 Metric Thread Gauge, Bolt and Nut Sizer for Quick Measurement

If you work with a lot of loose nuts and bolts, this is a really nice helper for organizing them. It is well-made, and based on the nuts and bolts I've sized, it is accurate. I have mine hung behind a cabinet door in my garage workshop, so it is readily accessible. Having priced out others, I believe this is a good value. Of course, it covers a lot of sizes, but not all possible sizes, but most of the common ones.

This is high quality and precise, and makes life a lot easier when I'm wrenching on something. No more guessing what size a nut or bolt is. Each gauge unscrews from the base so you can use them to check bolts/holes on things you can't pick up (like my garage door).

Very sturdy and has many of the common metric and SAE nut and bolt sizes.

This was definitely worth the price. It’s well made, metal instead of plastic. It will last.

Not only is this a beautiful looking tool hanging on my shop wall, it works great, it takes no time at all for me to figure out if something is metric or SAE and what the thread pitch and bolt size is. I really don’t know why I waited so long to buy something like this. It’s way better than all of the other ones I have

This helped me visually show customer their lug nut was the wrong size for the vehicle. The quality is build very well, definitely value able for the price. The only issue is the rubber pads have already fallen off, very minor complaint.

This device is well made and easy to use. The construction is rugged and it is surprisingly heavy even though the base is aluminum. There are two rows of male and female fixtures. The left side is metric and the right side is Imperial. I found it was easiest to start with the male fixture for sorting both nuts and bolts. To sort nuts just try threading the nut onto each male fixture to see which one is a match. For bolts and screws it is easiest to start by visually checking which male piece is a near match by aligning the threads as shown in the photo. Then a final check can be made by screwing the bolt into the corresponding female opening. This is a fast way to match bolts, and it minimizes the risk of cross threading a bolt into the softer aluminum section. This worked great for sorting my junk drawer of miscellaneous nuts and bolts.

Good quality, solid product. The threads are all clean and smooth. Saves me carrying nuts and bolts to compare by ripping open packages at Home Depot to test. A magnet on the back would be a great addition.