The Starrett 3810A is a state-of-the-art, digital instrument designed to test the hardness of large hard metal parts. Loaded with useful functions such as USB output and a built in printer, the 3810A is an ideal choice for fast accurate hardness testing. This versatile tester can perform tests that easily convert to the most popular hardness scales, including Rockwell, Brinell, Vickers and Shore. The tester is easy to use, simply load the impact body, place the impact body on your test piece then, push the button to begin testing. The 3810A is designed to test large hard parts. For example, tool steel should be close to 1” thick of solid material. The 3810A comes with a D impact device, calibration block, cleaning brush, manual and carrying case. • Accuracy: ±0.5% (referred to L=800). • Repeatability accuracy: ± 4L units L=Leeb. • Measuring range: 200-960 HL For steel and cast steel, alloy tool steel, stainless steel, gray cast iron, spheroidal iron, cast aluminium, brass, bronze, wrought copper alloy. • operating temperatures: 5-104˚F • Dimensions: 150 x 74 x 32mm (5.96” x 2.938” x 1.270”). • Weight: 245gms. • Kit Includes: 3810A Tester, impact device D, calibration test block, cleaning brush, manual and custom carry case. • Available options include DC, D+15, DL, G, C impace devices and special support rings.