SPI Digital Hardness Tester This high quality precision instrument uses the Rockwell A, B and C scales for measuring hardness. This unit features an ease of operation, automatic loading and unloading, automatic holding of test force and an easy-to-read LCD. Features include... Large backlit display with load progress bar. Standards: EN-ISO 6508 and ASTM-E18 Resolution: .5 of a Rockwell unit Test Loads: 10kfg preload / 60, 100, 150 kfg load Rockwell scales: A, B, C, F Testing Space... Vertical - 6.7" / 170 mm Horizontal - 6.5" / 165 mm (from centerline) High quality precision instrument for measuring hardness with ease of operation; precise and durable. Automatic loading, unloading and holding of test force. Dimensions: 34" H x 17" W x 25" Depth Accessories include... Diamond Rockwell indentor 1⁄4" shank Rockwell ball indentor: 1⁄16" ± 60 HRC test block ± 25 HRC test block ± 85 HRC test block Flat anvil: 60 mm Large flat anvil: 150 mm V-Block anvil: 40 mm Adjustable feet Protective spindle cover