Best Screw Gauges of 2025

"I found this gauge to be simple to use and it really helps identify both metric and S.A.E bolts. I've had no issues figuring out sizes, and the threaded holes make all the difference. Just remember not to force a bolt into the hole!"

"For the price, this tool is fantastic. It's lightweight and has a better layout compared to other options I've tried. I highly recommend pairing it with a drill gauge for added accuracy, but overall, this has been a great time saver for me."

"This is exactly what I needed. It's perfect for quick verification of thread sizing and pitch. I appreciate that it includes information on both sides, making it versatile for different tasks. I'm extremely satisfied with this tool!"

"For under 10 bucks, this is a tool any handy person should have on hand. Thread counts are accurate, the gauges are clearly marked, and it is put together well enough. If this gauge stops you from ordering the wrong bolt once, it will pay for itself."

"I was quite puzzled using this tool. I can match the threads, but I have no idea what to compare it with. I've posted questions for assistance, but unfortunately, I haven't received any useful answers. I ended up giving this tool 1 star."

"Mine didn't arrive covered in oil as others mentioned. The little plastic pouch is basically worthless. It offers a wide range of thread sizes and is particularly strong on finer threads. The use of the somewhat anachronistic Whitworth profile is a little bit strange, but it's still useful."

"The thread gauge works fine for my needs. It's affordable and easy to use, but I do worry about losing it since it’s so small."

"I was surprised by the variety of threads and pitches out there. This gauge is handy for matching screws and bolts quickly, saving me a trip to the store."

"I found this gauge to be a great addition to my tools. The metric side is accurate, and I appreciate the durable stamping. For the price, it's definitely a bargain."

"I use mine at work regularly. Very useful and accurate measurements. I don’t need instructions, but they should include them for beginners."

"The metric set was ready to use - easy to read. However, the standard set isn’t as good; it’s not so easy to read and the cut on the metal degraded as the thread count increased. I might keep it and try to use it, but I probably won’t buy it again."

"For the price, I can't complain. However, the online product description is poor and sometimes inaccurate. The 52 and 58 piece gauges are mostly duplicative, which isn’t clearly stated, so it seems like you’re getting more than you actually do."

"I recently got the Esdabem Nut and Bolt Thread Checker, and it's a game changer. No more broken tools at the hardware store! This tool feels high-quality — much better than what I've used before. The laser-etched numbers are clear, and the two rulers are handy for measuring bolt lengths. I also appreciate the dedicated holes for hanging it up. I wish it had magnets for easier access, but overall, I think it's a must-have for any garage!"

"As someone who works on various projects, I've often found myself with a pile of random screws and nuts. I already had a thread checker, but I wanted another for my 3D printing space. This tool is perfect because it covers sizes down to 3mm at a fraction of the cost. The SAE size listings also indicate thread pitch, which is super helpful. Just be careful with the aluminum base; it's best to lightly turn screws to avoid stripping the threads."

"I received this Nut and Bolt Thread Checker as part of the Amazon Vine program, and I was genuinely surprised by its quality. Solid machined aluminum construction makes it feel durable. I’ve used it several times, and it works perfectly for identifying thread pitches. I can confidently say, I would buy this jig if I had to!"

"I tested these on numerous bolts and found the threading to be flawless. The value is great, especially since I could use them to thread into everyday items."

"I really like the case and the assortment of thread checkers. However, I feel that the smaller checkers are a bit thin, which makes them feel slightly delicate."

"This tool has been a game changer for me. I was able to organize a lot of screws and nuts, saving me at least $500 worth of hardware."

"I work on cars as a hobby and often need to order a special nut or bolt, whether it's inch or metric. This tool allows me to try various sizes until I find the right one. Ordering new parts is much easier now!"

"I love that this tool is standard in metric, and so far, the quality has been awesome. The value is great, and I appreciate being able to hang it on my tool chest for easy access."

"This is an AWESOME TOOL! However, I like things to be 100%, and while this is 95%, I noticed some pieces are upside down on the steel cable. I can read upside down, so it's not a deal breaker, but it would be better if they all faced the same way. Great tool overall!"

“I was thrilled to find this thread pitch tool at a reasonable price. It quickly pays for itself by cutting down on hardware store runs. While it may not have every size, it offers a complete set of SAE and Metric for practical users. The compact case is a plus, and after testing, the threads feel smooth enough for their purpose.”

“This kit has been a game changer for me! After using a plate style checker at a friend's shop, I knew I needed one. I chose the HSS version for its durability, and it turned out to be a great value. The foam case keeps everything secure, and I’ve shown it off to friends who were equally impressed.”

“I absolutely love this set! It's very easy to use, and all sizes are clearly labeled. The laser etching looks nice, and the steel is much stronger than aluminum. I appreciate how it fits into tight spaces where other tools can't.”

"I should have bought this years ago. It saves me so much time confirming thread sizes among various nuts and bolts. Solid metal plate with SS bolts; it's well built and essential for any garage mechanic."

"This hardware gauge is clear to read and easy to use. The rubber feet let me lay it flat, making it easy to move around without mounting it. It really saves me time when I'm looking for specific hardware sizes."

"I find it frustrating trying to size random nuts and bolts. But this tool makes it quick and easy, saving me trips to the hardware store. It's a high-quality tool that belongs in every wood shop or garage."

"I find these tools great for quick sorting of bolts, especially in a well-lit area. The thread gauge is easy to use, which I prefer over testing with a known mating thread to avoid damaging the threads I'm checking. However, I noticed the 40tpi gauge is not serrated, which is a bit disappointing."

"I thought these tools would help me sort screws accurately, but I discovered that the metric holes above M2.5 are smaller than expected. For instance, the M12 hole measures around 10.3mm, which is frustrating. I might return them but am considering trying to fix the issue myself."

"After trying several screw sizes, I found that none fit the marked sizes on the guide. Just by looking at the 1/4" hole, I can tell it's too small."