WEN 10423 3 x 2 x 1-Inch Steel-Hardened Precision 123 Blocks, Two Pack

Didnt need ultra precision blocks so gambled on these. On my surface plate and using my best gauge these are dead flat. I am surprised and very happy. I have had great luck with WEN products and that is why I bought them.

Great value for the money… other reviews seem to judge these as if they were gauges, but for this price, very useful 321 blocks for the hobby machinist..

For the thousandth time; you cannot send precision tools, micrometers, dial caliper’s, dial indicator’s, 123,246, blocks in a brown paper lunch bag!! It has to be shipped and protected in a box!!!!!!

Digital Micrometer measured 1.000x2.000x3.000. Packaged well and coated with a light grease to prevent rust during shipping. Expect to spend a few minutes cleaning and drying these. Very easy to use on Scroll Saw, Band Saw, Table Saw, and Miter Saw. I also found one of my Combination Squares was not true.

Great product, great price & fast shipment!!

For the money you cant touch them. First pair was almost a perfect match. 8 months later I bought a second pair with a little better match. A little touch with the surface grinder and I have two set precision matched blocks. Will be buying more.

They are what they say they are. Great value.

1-2-3 blocks are about precision, you get three true faces of precise dimensions and angle... usually they would cost you over 50$... but here... at this price, I have zero complaints... +/- 0.001mm maximum deviation on each side as verified by multiple precision calipers I have; that is.. one micron. I think this is more than acceptable for 99% of projects a home engineer can have. So Wen, thank you to give us access to this for this price. If I was very picky, I would only say that the corners are not perfectly deburred, at the corner of the rectangle, the edges are not perfect and curve .. e.g. the chamfer created by the deburring process is not equal in width along the whole length but gets wider at the ends, near the vertex of the cuboid/rectangular prism. This doesnt affect the overall use, so I am very happy... unless you need to align at this precision, but then youd be using some metrology quality blocks not this haha. Ok, so to everyone who has no blocks but uses a saw, get yourself a pair! Thanks again

No specification for accuracy provided in listing. After knocking down any burrs with a set of precision ground flat stones dimensions as measured by tenths micrometers were within 3 tenths, over on the 1 side and under on the 2 and 3 inch sides. Not bad for the price.

Im impressed, came out perfect vs a dial indicator on a granite top with no discernable variation, perfectly flat.