122Pcs/Set 1 Grade 0 Grade Inspection Block Gauge Test Caliper Blocks Measurement Instruments ,Reliable Quality

122 pcs Grade 0, Grade 1, Steel Gage Block Set with MFG'S certificate. Manufactured under carefully controlled conditions allowing for the highest degrees of accuracy when used at a temperature of 68 degrees F. (20 C). All gage block sets are assigned serial numbers and accompanied with a certificate of inspection listing the deviation for each block. for machinists, woodworkers, metalworkers, and more. Hardened to HRC 64 / All gage block sets are made to special standard to resist corrosion and defacement.