Baseline hydraulic pinch gauge has a 50-pound capacity. Unit has 2-1/2 analog gauge. Unit has 1 year manufacturer s warranty. The pinch gauge uses a hydraulic system to assure convenience product reliability and measurement accuracy and repeatability. Therapist can support the pinch gauge during testing yielding a more accurate result for all pinch tests. Use for tip key and palmer tests. Maximum reading remains until the unit is reset. The Baseline pinch gauge the results are consistent with published Baseline and Jamar studies. The strength reading can be viewed as pounds or kilograms. CE Certified. Comes in a protective carrying case.