1-2-3 BLOCK SET WITHOUT HOLE---2PCS/SET
- MADE OF HARDENED STEEL
- HARDNESS 56 TO 60RC
- PRECISION GROUND ON ALL 6 SIDES
- TO 0.0003” SQUARENESS PER INCH.
- SIZE WITH IN +/- 0.0002” FLATNESS 0.0002”
- PARALLELISM 0.0002”