Review on 💎 HFS (R) 123 Blocks Ultra Precision Pair 1-2-3 .0002 Hardened, 23 Holes - 0.0002"+ by Douglas Davis

Honestly, 1-2-3 blocks is a gem! I'm no machinist, but I keep finding a use for them. Super hardened steel so I think they will last forever. They have 3/8" threads on some of the holes so you can basically twist them together to make clips, perfect 90 degree Ls and whatnot. Use them on the photos you take to get an idea of the size, because of course they are exactly 1" x 2" x 3". Also, they weigh exactly 1 pound. Note that all edges are slightly bevelled, so the measurement is taken from the face and not the edge. Don't expect to use it as a ruler. Expect to use it as a weight, square, stop, small table, clamp, bench stop and more. Also, I would recommend buying a few sets, it's good to have 4 (or 6).