Profile: Shanghai Tuopu Si Technology Co., Ltd specializes in designing and manufacturing portable hardness testers. We are equipped with two standardizing rockwell hardness machines by which our standard hardness blocks and indenters are tested one by one. We offer various testing solutions for rapid, on-site hardness testing of metallic materials and parts, especially for large or mounted workpieces. Our products comprise of portable rockwell hardness testers, large portable rockwell hardness testers and portable chain clamp rockwell hardness testers.