The Jamar Hydraulic Hand Dynamometer by Sammons Preston is a high-quality dynamometer designed to accurately measure hand grip strength. With a measuring range of 0-200 lbs, this product is ideal for use in various industrial, medical, and fitness applications. Made in the United States by Sammons Jamar, a trusted brand known for producing reliable testing equipment, this dynamometer ensures precise and consistent results for users looking to evaluate and improve their hand strength.