TamBee 6Inch 150mm Mini Caliper Double Scale Plastic Vernier Caliper for Jewelry Sliding Gauge Ruler Measuring Tool 5PCS(Mint Green)...

The slide is Very loose, but moves smoothly. The scale is as accurate as I can see against a 6"\15+mm steel rule. Now I have one everywhere in the house I might want one.

I use this to measure the width and depth of watches, or as a reference when reading the size of a watch. This is all I need and I got 5 of them for the price of one elsewhere. Easy to read, mm and inches, they work great. Just don't use these to measure pistons or jet engine parts and you will be fine.

These were exactly what I expected. They are perfect for measuring to about a 32nd of an inch. I got these to use with a high school class and they are better than using a ruler. Don't expect the accuracy of a more expensive caliper. They are great for what they are.

For the money, This is an excellent deal for a slide caliper. Accurate enough for a slide caliper. Now I have 5 of them...one for the shop, one for the house, one for the boat, one for the other boat, and one for my truck.

Just ok. They will measure within 1 mm. The vernier scale appears to allow reading 0.05 mm, but it is not accurate. The description says "measures to 150 mm", At first, they did not open beyond 131 mm but it was just a thin molding flash that stopped it; pushing harder sheared that off, and this model opens to 157 mm. The mm lines become broader and somewhat smudged beyond 120 mm. The 1.6mm metal rod which extends from the end for measuring depth of holes is about 1mm short, although you could fix that by sanding off the plastic end square and flush with the rod. Now you may not expect better performance from plastic calipers, but I have another style which is slightly, but noticeably better made and the vernier scale aligns correctly. You can see the difference in the photo; the slightly-better model is grey and has a ridged thumbrest not quite at the rear of the slider, and it will open to 150 mm. This black set has a smooth thumbrest which is flush with the slider back edge. NOTE: It is possible and perhaps even likely, that at this price point there is no meaningful process or quality control on these products and the accuracy variation between the two designs I noticed is just random from batch to batch.