BeefBuilder Handgrippers are the ultimate test of grip power. Because BeefBuilder Handgrippers are available in 10 different resistance levels (pounds pressure) to close, these handgrippers allow you to train your grip and gain measureable grip strength by increasing the resistance. Simliar to training any other body part by adding weight plates to a bar or machine, you simply squeeze the next higher resistance handgripper instead. BeefBuilder Handgripper strength stamped on bottom of handle. Precision made in the USA.