This push-pull dynamometer is used for evaluations an muscle strength. This device accurately measures the force applied from compression and tension tests. Results are measured and displayed on a crisp digital screen. 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.