Ultrassist Plastic Vernier Caliper (2pcs), 150 mm Mini Plastic Caliper for School Student, Portable 0-6 Inch Measuring Tools, Sliding Gauge

I got these because, frankly, they looked like a neat way to introduce my kids to metrology. At a few bucks apiece I could buy half a dozen and place them around the house. I keep one in the garage and one at my computer desk because they're useful in a pinch. They're no more accurate than a tape measure, but because they slide into the device like calipers, they're more accurate than a ruler or a short measuring tape. Overall, if you understand their limitations, they're great and meet those modest expectations.

Pour mesurer la tension de ma machine à tricoter circulaire. Facile d'utilisation. Je le recommande.

If if you don’t need to be 100% specific within thousands of an inch, but you just wanna know roughly how big the circumference of something is this is a tool to buy nice and cheap and does job.

I liked the price and the plastic, and the vernier scale works. But the depth gauge was off by 1/16 inch (poor manufacturing), and one of the calipers was really, really loose (more poor manufacturing). I guess you get what you pay for.

So frustrating. This is the 3rd caliper I've ordered from Amazon and they're all inaccurate.