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 1.375 in - 3.625 in . Use of the wrist strap helps prevent accidental dropping. Available in either a soft or hard case.