Features: Enhances your grip strength with this highly tension spring hand exerciser craft of durability carbon steel and ergonomic ABS/TPE materials for consistent resistance training. Its compact, light design features a non slip textured surfaces that ensures secure handling during intense workouts or rehabilitation. Ideal for fitness enthusiasts seeking forearm development and patients recovering from hand injuries requiring progressive therapy. Train anywhere perfect for office breaks, home gym routines, or travel friendly muscle maintenance on travel The contoured shape reduces hand fatigue during extended use while accommodating various hand sizes for teens to seniors. Specifications: Component: highly-Strength Spring Steel+ABS+TPE Grip force adjustable ranges :20-60kg Total Width:Approx.11.3cm/4.45inch Ball Diameter:Approx.6.50cm/2.56inch 3Option Type; Practicality: Suitable for various fields such as strengthening wrist strength, rehabilitation training, office relaxation, etc. Package Includes: 1pc Hand Grip Strengthener note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.