DESC: Ideal for routine screening of grip strength and initial and ongoing evaluation of clients with hand trauma and dysfunction. Unit comes with carrying/ storage case and complete instructions. Warranted for one full year. The warranty does not cover calibration. See below for information on a convenient and economical way to calibrate your dynamometer. CE Marked. Latex free. The Jamar Hydraulic Hand Dynamometer combines precision with convenient features: Dual-scale readout displays isometric grip force from 0-200 lbs. (90 kg.) Peak-hold needle automatically retains the highest reading until reset. Handle easily adjusts to five grip positions, from 13/8''- 33/8'', in half-inch increments.