Benchtop Hardness Tester Scales Rockwell A Scale 80 Rockwell B Scale 90 Rockwell C Scale 63 Resolution - Magnification - Indenter Diamond Turret - Work Surface Width (In.) 6 in Work Surface Depth (In.) 6 1/2 in Max Workpiece Height (In.) 6 1/2 in Analog Dial Output Features - Includes Accessory Case Diamond and Ball Indentors (4) Test Tables (3) Certified Test Blocks