1 Pair 123 Blocks 1-2-3 Ultra Precision .0002 Hardened Without Holes
[Hardness]: Precision ground & hardened on all 6 sides to HRC 55-60.
[Size]: .0003" squareness per inch Flatness .0002" Parallelism.
[Features]: No hole.
[Material]: Made of hardened STEEL and ground.
[Application]: Used for set-up, layout, and inspection jobs.