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

Ok, after reading some other reviews I was a little skeptical of these gage blocks. Since machining is just a hobby I decided to give them a try because of the price.The wooden box isn't a fine woodworking piece (I am a cabinet builder by trade) but arrived intact and seems well built and will certainly work for me. It did take me a couple hours to unwrap and clean all 81 blocks with alcohol, I watched youtube videos while doing this. After cleaning the blocks I wrung several sets together and measured with a micrometer and the measurements were mostly dead on. I did get a couple stacks of 6-8 blocks that came 0.0001 over, could be my micrometers calibration or my hand heating it up. Close enough for my hobby use.

God value for money and fine for general machining work.

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.

This is a very good set of gage blocks and work as intended.

Great purchase for my machine shop. Would recommend.

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...

I've not had a chance to actually USE the blocks yet. They arrived promptly and were well packaged. The blocks are wrapped in rust-protective paper, and in a nice fitted wooden box. So far, the order meets expectations.

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.