You're referring to a Grip Strength Trainer — a versatile hand and forearm workout tool designed to improve grip strength, wrist endurance, and finger control. These devices are widely used for fitness, rehabilitation, sports training (like climbing or martial arts), and injury recovery
Adjustable Resistance (Commonly 5kg–60kg or 11lb–132lb)
Lets you increase or decrease tension to suit your level or rehab goals
Great for progressive strength training
Ergonomic Design
Molded, non-slip handles for a secure and comfortable grip
Fits all hand sizes — from teens to adults
Duable Spring Mechanism
Made from steel or carbon spring materials for durability
Provides consistent resistance without loosening easily
Compact & Portable
Easy to carry in gym bags, desk drawers, or use at home or work
Ideal for daily use or stress relief
Targets Multiple Muscle Groups
Builds strength in:
Fingers
Wrists
Palms
Forearms