Adjustable resistance for all users - 10 to 60 kg adjustable resistance to suit men, women, adults and children. Use the level that matches your strength and goals. Durable, high quality construction - Made with a steel spring core and rubber material for durability. Designed to be long lasting, resistant to breakage, and gentle on your fingers. Mechanical counting for progress tracking - Built-in counting mechanism logs each training rep. Helpful for seniors, adults, and teenagers to monitor progress over time. Ergonomic and portable design - Fits different hand shapes and sizes. Lightweight and compact enough to store in a bag, enabling easy training anytime and anywhere. Practical use scenarios - Sport and training prep: warm up or build forearm and grip strength for activities like climbing, tennis, golf, or weightlifting. - Daily efficiency: use during breaks to maintain grip strength for everyday tasks such as typing, carrying groceries, or manual work. - Rehabilitation and maintenance: gentle, repeatable resistance suitable for light rehabilitation or ongoing grip maintenance while traveling or at the office.