The Lafayette Professional Hand Dynamometer is designed to give accurate grip strength readings for both routine screening and for evaluation of hand trauma or diseased hands. The adjustable handle can be placed in five grip positions, from 1.375 in to 3.375 in, in half-inch increments. This sealed hydraulic system features a dual-scale readout that displays isometric grip force from 0 to 200 pounds (90 kg) with accuracy within 1%. Includes instructions, norms, patient record charts, and carrying case. The Lafayette Professional Hand Dynamometer features a leak-proof aluminum collars to protect the bellows from damage, industrial grade gauge that assures repeatable accuracy, and an easy-to-read gauge layout.