Fowler TH500 Analog Rockwell Hardness Tester A high quality precision instrument that uses the Rockwell A, B & C scales for measuring hardness. Features Include... Standards: EN-ISO 6508 and ASTM-E18 Resolution: .5 Rockwell unit Test Load: 10 kfg preload / 60, 100, 150 kfg Rockwell Scales: A, B, C, F Accessories Include... Diamond Rockwell indentor Rockwell ball indentor 1/16" +/- 60HRC Hardness Test Block +/- 25HRC Hardness Test Block +/- 85HRB Hardness Test Block Flat Anvil 60mm Large Flat Anvil 150mm V-Anvil 40mm Adjustable Feet Protective Spindle Cover