Review on Matched Hardened Precision Machinist Milling by Michael Hudson

I am very surprised at how accurate they are in pricing. I don't have any micrometers/indicators/surface plate to check, but I do have some good calipers that show they are 100% accurate. 1x2x3 inches on all sides, to at least 0.0005 inches (my vernier calipers didn't find any deviation from the exact measurements). I got them for woodworking to be honest, but I'm happier with them than some of the other 1x2x3 blocks with holes in them. and costs about 40% more. Again not a machinist but I am very happy with them.