Baseline hydraulic 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 is made in USA and 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