Effective muscle building and strength training: The grip strength trainer (also known as a hand gripper) is ideal for building muscles in the hand, fingers and forearm. Perfect for strength training and fitness, it sustainably strengthens grip strength – for sports like climbing and playing instruments. Safe and comfortable use: The hand training device has a non-slip PP grip with an ergonomic shape. It adapts to every hand and sits securely and comfortably. Free from harmful surfaces, it ensures safe training with every use. High quality and durable: The hand trainer (gripper) is made of robust PP material and high-quality spring steel. Durable elasticity, rust-free and wear-resistant, it can withstand even intensive exercises for a long time – a reliable companion for long-term strength training. Compact and portable: With its compact design (15 x 12 cm), the grip strength trainer easily fits in your bag or gym bag. Enables flexible exercises anywhere: at home, in the office, while traveling or at the gym; ideal for fitness on the go. Versatile for every athlete: The 2-piece grip strength trainer set allows simultaneous training of both hands. Suitable for beginners and advanced users, suitable for sports training, grip strengthening, stress reduction and a regular fitness program.