The heavy-duty dynamometer features the hydraulic system that is used in the industry accepted Baseline and Jamar hand dynamometers and pinch gauges. Hydraulic system ensures accurate readings. Much lighter (1½ lb. vs. 6 lb.) and easier to use than spring push-pull dynamometers that are in common use today. Dial continuously shows instantaneous force and holds the maximum force reading. This maximum reading should be manually recorded prior to resetting for the next test. Comes with analog (dial) readout. Choose either 100 lb. or 250 lb. force capacity unit. Comes with 3 push pads (padded curved, padded straight and 1 cm2 circular), 1 pull hook and 1 snap-lock hook. Comes in cushioned carrying case with muscle test manual. 1 year warranty. CE certified.