Best Screw Gauges of 2026

"After searching everywhere for a specific tiny laptop screw, I was amazed at how much time I could have saved with this tool. It truly takes the guesswork out of identifying screw size and thread type. While I'd prefer it in aluminum or stainless steel, the convenience and accuracy are impressive."

"I was cautious about buying a plastic gauge, but now that I have it, I'm very happy with how well it measures even the smallest bolts. As long as you're gentle, it should last a long time. For the price, it's an excellent value."

"This is exactly what I needed—a budget-friendly gauge that quickly identifies screws. I work with small hardware, and this tool is a perfect fit for my daily needs."

"I find myself using this gauge all the time—it's built from quality metal, extremely durable, and the markings are super clear. Being able to size screws at home instead of running to the hardware store has saved me a ton of time. Definitely worth the price."

"As someone who deals with a lot of fasteners, I appreciate how easy this tool makes it to identify screw and bolt sizes accurately. The metal build feels solid, and the design is intuitive and complete. Pocket-sized and comes with a handy pouch—it’s a smart addition to my toolbox."

"I used this to identify a tricky M14-1.0 thread that nothing else would fit—the thin, stiff metal gets into fine threads perfectly, unlike my old plastic gauges. Markings are easy to read, and it saved me a lot of aggravation. I'm really glad I picked this up."

"From my experience, this tool is rugged, affordable, and much more convenient than the typical flat plexiglass checkers you find in stores. Having both Metric and Imperial sizes on one cable is a game changer for me. As soon as I got it, I knew it was the right purchase—five stars from my Vermont farm!"

"This product is so practical and portable that I wish I had it much earlier. At stores, their checkers are often stripped or missing, but with this, I have full control and can bring it right to the job. If you take care of it, it should last a long time—no more trips back and forth to the toolbox!"

"It does a great job measuring and identifying both Metric and SAE bolts and nuts. My only minor gripe is that the labels are painted instead of engraved, but for the price, it's still a very handy gadget. I’d recommend it to anyone needing a versatile checker."

"When I started organizing my massive collection of fasteners, these Screw Check’r sizing tools really made a difference. Sorting screws is now quick and straightforward, and I can find exactly what I need in seconds. The plates are solid and clearly marked, which sped up a project that would have taken weeks down to just two days. While there’s room for improvement—like engraved markings instead of silk-screened—these tools have made my whole system more efficient and are built to last."

"I’ve tried eyeballing screw sizes, but it’s tough to tell them apart sometimes, especially the close ones. This plate has been a lifesaver for sorting my dad’s old fasteners—it feels sturdy and even helped me chase some slightly damaged threads (though that’s not its main use). It makes the whole sorting process much easier and more accurate."

"I’ve owned both the metric and inch versions for years now and can say they’ve made hardware sorting so much easier and more accurate. They’re durable, simple, and eliminate all the guesswork. For anyone who deals with a lot of small hardware, I recommend having both types."

"These gauges are quite handy on my workbench for sizing different items. I find them useful and they are easy to keep clean and organized."

"I found this set compact and extremely useful, especially for figuring out thread and drill bit sizes when working with door hardware. It makes my tasks much easier."

"When I first got this set, I was a bit confused trying to size some of my drill bits since I didn't know their exact sizes. It took me a little while to get the hang of it, but once I did, it worked well."

"I picked this up for my husband and he’s really impressed with the excellent quality and accuracy it delivers. It’s well-constructed, easy to use, and includes everything for precise measurements. He’s genuinely happy with it, so I’d definitely recommend it."

"As someone who often needs to reverse engineer or design parts, I consider this a must-have tool in my kit. It’s compact, made of good materials, and covers a wide range of thread sizes. Using it is straightforward—just measure the diameter, then match the gauge to the threads. It’s saved me a lot of time for a very reasonable price. Highly recommended!"

"I use this gauge mainly for restoring old bikes and car parts. While it might feel a bit ‘old school’ to some, it’s been spot on for thread checking and I appreciate that it doesn’t rust. Even though it’s held together by thumb screws, it stays together well enough and hasn’t fallen apart on me. Happy to have one in both my house and shop."

"I was genuinely surprised by how well-made and solid this thread checker is—it's crafted from metal, not some flimsy material. It feels sturdy, works as expected, and is a must-have for anyone who does hands-on work. I wish I’d bought one sooner!"

"I picked this up as a Father's Day gift and was impressed by the thoughtful features. The sturdy aluminum plate, precision holes, and both metric and imperial rulers really set it apart. It even starts at a smaller size than most other checkers. For the price, it’s a steal."

"I was always hauling bolts and nuts to the hardware store just to figure out their size. This tool saves me from those trips and lets me get the right parts from home. It’s affordable and already a handy addition to my toolbox."

"When my order arrived, I immediately knew I'd made the right decision. It's well-built, affordable, and way more portable than the typical plexiglass checkers at hardware stores. Having both Metric and Imperial on a single cable is incredibly practical. Five stars from our Vermont farm!"

"I can't believe how handy and convenient this is—I wish I'd bought it sooner! The store checkers are often damaged or missing, but now I have total control. I can take it right to the job, and if I take care of it, it's going to last for years. It saves me trips back and forth to my toolbox!"

"This tool easily measures and identifies a wide range of Metric and SAE nuts and bolts. The price is excellent and shipping was fast. While I do wish the labels were engraved instead of painted, I still highly recommend it!"

"Identifying the sizes of nuts and bolts has never been simpler. I quickly figured out the right hitch for my ebike trailer and finally sorted my stash of random fasteners. This tool has made organizing so much easier and faster."

"This set is a game-changer for my workshop. The pieces are color-coded and clearly labeled, making it super convenient to grab the right size. Much better than plastic gauges, and the price is right. I’m even considering getting another set."

"I work on electronics often and this kit is incredibly handy. The foam insert is well marked and the range of small sizes is excellent. Although the case is a bit flimsy, the checkers themselves are well made and cost-effective."

"Having both metric and USA measurements makes these super convenient for figuring out bolt sizes. They're great for quickly checking what I need."

"I keep one in my garage and another in my workshop. They're absolutely invaluable for fast screw and nut identification. Plus, getting two with both imperial and metric scales is a fantastic deal."

"They work well for occasional use, but I wish the measurements were threaded for more precision. Still, they do the job."