A Hand Grip is a spring-loaded hand exerciser with two handles that is compressed by squeezing, designed to develop grip strength, forearm conditioning, and hand function in rehabilitation and fitness settings. The spring mechanism provides adjustable or fixed resistance ranging from 10 to 200 pounds, allowing patients to progress from light grip strengthening to advanced forearm conditioning as strength improves. For the physical therapist and occupational therapist, the hand grip provides targeted, progressive resistance training for the intrinsic hand muscles, thenar eminence, and forearm flexors—critical for restoring grip strength needed for opening jars, carrying groceries, turning doorknobs, and performing activities of daily living. For patients with arthritis, carpal tunnel syndrome, or post-operative hand weakness, progressive hand grip exercises rebuild functional grip strength essential for independence. For patients with neurological conditions such as stroke or traumatic brain injury, the hand grip provides a simple, measurable tool for retraining grip strength and motor control. Compact, portable, and requiring no additional equipment, the hand grip is an effective tool for grip strength rehabilitation, sports performance enhancement, and home exercise programs across the lifespan.