Using a durable hydraulic design, the Dynatron Hand Dynamometer is ideal for evaluating grip strength. Designed to provide years of dependable service with minimal maintenance. Features dual scale readout measuring up to 200-lbs./90 kg. Peak/hold needle stays at the highest reading until reset. Isometric measurement is accurate for repeatable results within 2%. Easily adjusts to five different positions from 1 3/8″ to 3 5/8″. Use of the wrist strap helps prevent accidental dropping. Available in either a soft or hard case. Limited two-year warranty.