Rockwell Hardness Test Blocks - High Precision Calibration Tools for Metal Testing | Ideal for Labs, Factories & Quality Control

Available in A-Diamond 60Kg (Round) HRAs 28.5 to 83.

Manufactured from the highest quality steel with a special heat treat and cold treat process which insures maximum consistency and repeatability.

Round Blocks - 2½" diameter.

Accuracy exceeds ASTM E10, E92 and E384 Standards.