Spurtar Vernier Caliper Measuring Tool 6" Stainless Steel, 0-6Inch/0-150mm Manual Non Digital Calipers, 0.001"/0.02mm High Precision Durable Micrometer

Most of the other reviewers complains about various issues with this caliper: accuracy, oily, possibility of rust, roughness of edges. All right complains, but they need to be put in perspective. If you are considering the purchase of a vernier caliper you know at least something about mechanics. How many parts made such a device? Building that many, with highest quality material, to the highest possible standard for accuracy (hence sharp) on one side of the part (the "internal") and for user friendly (hence smooth) on the other side (the "external") cannot be made cheap. All manufacturing procedures have tradeoffs. So for the price, this is an excellent product. Is it accurate enough? Yes, mine is accurate to the level of the vernier scale, however a tiny bit wobbly at that level, hence one less star in accuracy. Easier to read. Is it oily? Yes, but for most use that's minor problem. Is it rusty? No, but the manual says that if you clean the oil completely it might become so. Is it smooth? No, it's a bit sharp. If I had time to spare and would use it more often than I do, I'd try to smooth it with a file. But for occasional use it's totally usable. At this price, it totally deserves five stars. Granted, if you compare it with a similar one costing 10x its price, it would barely get two stars, perhaps it'd get even just one. But that would be an unfair comparison, like a race between an accomplished world champion and a random kid in middle school.

Bought this five years ago and really like it. Measures about .001 over and that's fine for the price. Looks like you might be able to calibrate the vernier scale but not worth the effort. The inch vernier is a little hard to read if you really need that last thousandth, but it works. Works just fine, reliable and no battery. For the price it's an excellent value and useful to have around. Very clean, simple and functional. The knurled thumb adjust is not a rotating fine adjust wheel, just solid bump.

Pros: (1) Mine lines up on 0 pretty well when fully closed.(2) The plastic case seems fairly protective. (3) The slide feels snug, not sloppy.((4) It came with a decent, separate, 6 inch / 150 mm metal ruler.)|||Cons: (1) The ad says "smooth slide with no grittiness" but the slider movement on the caliper I received definitely feels somewhat gritty. Lubrication helped a little bit.(2) The Inch scale does NOT look like the scale in the ad pictures. The whole-inch numbers on the caliper I received in June 2024 are unnecessarily small & hard to find. I improved the situation a lot by putting a red dot (with an Extra Fine Point Sharpie) above each whole inch number. (See my picture.)(3) If the printed markings are etched, they are not very deep, so the ink may wear off prematurely.(4) The "user manual" is a single 7x10 inch piece of paper with some helpful info, but their example for reading the metric vernier was poor (not helpful). Their online metric vernier example is much better than their printed one.|||Notes about certain other reviewer complaints that I feel might be unjustified -(1) Some reviewers complained that this caliper can't be stainless steel because it is attracted to magnets "and stainless steel is not magnetic". However, there are over 50 "standard" formulas for stainless steel and some types (hardened martensitic stainless steel for example) are indeed attracted to magnets. (Unfortunately, the ad doesn't specify the type of stainless these are, it only says "hardened stainless steel".) These calipers may or may not resist rust well, but that ability cannot be judged strictly by how well they stick to magnets.(2) Some reviewers complained that the marks on the inch rule are at 0.025ths (40ths) of an inch instead of 1/2, 1/4, 1/8, etc. If you want fractions and you don't need to be more precise than 16ths, you should get a different caliper. However, many metal workers work to decimal inch specs, so this scale is right for them. Plus, getting a precise value from fractional inch vernier calipers involves nuisance frational math because you have to add x/y (from the bar) to z/128 (from the vernier) where y can be 2, 4, 8, or 16. Then you'll probably want to try to reduce the resulting fraction to have a smaller denominator (if you can).(For example, you might read 5/16 + 6/128. (That's 5/16 from the bar + 6/128 from the vernier.) Some math: 128/16=8, so multiply 5/16 by 8/8 to get 40/128. 40/128 + 6/128 = 46/128 = 23/64.)Decimals are MUCH easier to work with than fractions with different denominators are. (E.g. you might read 3 x 0.025 + 0.008 = 0.075 + 0.008 = 0.083.) If you must convert from a decimal inches caliper to fractions, using a chart is pretty easy (you just have the nuisance of keeping the chart close by).

This is exactly what I needed. Working on bicycles, I need to order stainless steel bolts to replacement some of the more non-standard ones I find. As received, I verified the tool met their stated level of accuracy. Quality, solidly built tool, and I can verify the case received was in perfect working condition. Best of all, the battery never dies and the digital accuracy never changes and needs to be recalibrated. Yes, a millimeter is a small thing, and the numbers are small and may be hard to read if you have poor eyesight. If my eyesight deteriorated, I would still by this tool - and just take a pic of the scale with my phone and zoom in to read it.

These are nice. I was expecting something cheap and oily from some of the product reviews, but they seem fine to me and are a really good value. No complaints for the price. The calipers even come with a carry case, a metal ruler, and a small cloth to wipe down the caliper.