Precise Rectangular Gage Block Set-Metric

Metric Gage Block Set
87 pieces.
0.5mm thru 100mm.
Each block is steel and hardened to 65RC, stress relieved, lapped to accurate size, parallelism & flatness, then carefully inspected and marked for size designed to meet close tolerance.
Each set includes standard sizes found in more expensive sets. Each block individually serialized and conforms to the rigid standards of the National Bureau Of Standards.

Grade 3 tolerances = +8, -4 millionths.