Phase II PHT-3500 Portable Hardness Tester with Printer is a "State of the art" digital tester. It is designed to test the hardness of large hard metal parts. Loaded with useful functions and a built in mini-printer that allows for easy record keeping. The PHT-3500 is clearly the industry leader for fast accurate hardness testing with advanced USB output and thermal printing capabilities. The PHT-3500 can perform tests that easily convert to the most popular hardness scales, including Rockwell, Brinell, Vickers, Shore, etc.