Unlike conventional pinch gauges, the Jamar Hydraulic Pinch Gauge's unique design frees the client to perform a true pinch pattern because the therapist, not the client, supports the weight of the gauge. A highly accurate pinch force measurement, devoid of artifact, is the result. Red indicator needle remains at maximum reading until reset. Measures pinch force to 20kg (45lbs). Includes instructions, handy carrying case and one-year warranty.