In today's health care environment, accurate and objective data is required for reimbursable rehabilitation services, making the JAMAR Hydraulic Hand Dynamometer an indispensable tool. Ideal for routine screening of grip strength and initial and ongoing evaluation of clients with hand trauma and dysfunction. Virtually leak proof hydraulics and isometric design ensure accurate, reproducible results and years of reliable service. Built to last, a shock resistant rubber cap protects the stainless steel gauge and a wrist strap prevents accidental damage if dropped. Unit comes with carrying/storage case and complete instructions. One year warranty. The warranty does not cover calibration. The JAMAR Hydraulic Hand Dynamometer combines precision with convenient features: Dual scale readout displays isometric grip force from 0 to 90kg (0 to 200lbs). Peak hold needle automatically retains the highest reading until reset. Handle easily adjusts to five grip positions, from 35 to 87mm, in 13mm increments. At minimum, an annual calibration and tune up is recommended to ensure long term accuracy of the unit. Please contact Customer Services for full details of this service.