SPI Dial Rockwell Type Hardness Tester This high quality precision instrument uses the Rockwell A, B and C scales for measuring hardness. Features include... Full Load: 60, 100, 150kg Preset Load: 10kg Throat depth: 5.25" Size of base: 7.25" dia x 18" Machine Height: 24.5" Approximate Net Weight: 150 lbs Accessories include... 120° Diamond Penetrator 1/16" Steel Ball Penetrator 1 - Rockwell A. Test Block 1 - Rockwell B. Test Block 3 - Rockwell C. Test Blocks 5-3/4" dia Testing Anvil 2-3/16" dia Testing Anvil 2-3/16" dia Testing Anvil with V-Groove Protective spindle cover Dust Resistant Plastic Cover