Accusize Industrial Tools Precision 81-Piece Steel Gauge Block Set, Grade B Accuracy, Corrosion-Resistant, P900-S581

For the price these work just fine.

These are actually pretty nice blocks. great for doing simple stuff on a knee mill.

The blocks came wrapped in thin wax paper and coated in cosmoline or some other rust inhibiting substance (the blocks are made of steel - thus required). The "business ends" are polished to a mirror-like finish. The blocks wring together tightly. I have checked a few and they seem accurate enough for my needs. I've compared my results against the laminated spec sheet, of the ones I've checked... the serial numbers match up and the measurements seem to be accurate. Workshop grade gauge blocks should be accurate to 50 millionths of an inch, matching the accuracy of a quality micrometer. Overall, I'm satisfied! Would buy again.

If you are looking for a good quality master set for a clean inspection area, go with a higher precision grade. However, these make a great set for everyday shop use. If absolute precision is not necessary and they will be exposed to the workshop environment, an inexpensive set like this is just the ticket. Negative: They do not all wring together well, and certified dimensions on some did vary a bit farther than I would like from the nominal size. Positive: Inexpensive and comes with a certification displaying actual measurements of blocks. For a shop environment, I would highly recommend. For a master set in a clean environment, get a better set.

I saw that others had some issues with the quality of the box, but mine was in very good condition. Box is solidly-built with a decent hinge and latches, as well as four plastic pegs on the bottom. Not sure if the others just had bad luck or if I got lucky. Gage blocks themselves are good for the price, and should be sufficient for most shop operations. They wring well and came wrapped in oil-paper to prevent rusting. I would recommend these for most shop operations that don't require intensive tolerances.

Wood box took a hard hit, before it was shipped to me based on how it was taped together prior to going into the amazon packaging. Box not perfect but ok. All blocks were serialized correctly vs the included chart. Each individually wrapped with corrosive inhibitor. I've measured maybe 50% with descent shop grade (Mitutoyo) indicators and they do seem correct. They also wring together well, including the larger inch plus sizes. Can you imagine the boredom of putting these kits together...

The blocks all measure within 0.0001" using my tools. They might be a lot better than that but I can't measure past that level. More than good enough for my hobby shop. Nicely made and polished. The box is also quite good.

Very nice hard case with rubber feet. All blocks came wrapped in protective grease paper. This set is not for inspection, but I am very pleased with the accuracy. The included certificate of inspection shows the deviation in millionth of an inch which cannot be correct. The deviations are microns. For example, 12 microns is .00078 inches, for my shop this is acceptable.

EXCELENTE

Very nice gauge block set for shop-floor ,it was a concern for the surface finish(read some reviews) but was like a mirror finish ,inspected each block and all within spec.

Product was what I expected. Delivered early.

Delivered on time, measurements were spot on. Perfect for calibrating other gauges or certifying calipers for use on site

I'm a machinist by trade and I bought this set for my tool box at work. It's a decent set to have on the shop floor for gauging parts and setting gauges. The box seems to be decent quality and the fit and finish of the blocks is good and the set comes with a calibration cert. They wring together fairly easily, the one complaint I have is the markings on the blocks could be a bit deeper. As they are they're a bit on the faint side and I could see them becoming illegible after heavy use. Overall a good buy.