This push-pull dynamometer is used for evaluations an muscle strength. This device accurately measures the force applied from compression and tension tests. Comes with three push pads including one padded curved, one padded straight, and one 1cm-squared circular. Also includes, 1 pull hook, 1 snap-lock hook, and carrying case. One year warranty. Add a single or dual grip handle for applying larger loads. Choose from one of four size options.