Features:Increase your grip increase your liftsExcellent for building forearm strengthWorks great for increasing speed, strength and power in the wrist, hands, fingers and forearms.Excellent recovery & rehabilitation tool for arthritis, carpel tunnel, rheumatoid arthritis, tendinitis, post surgery, tennis elbow, wrist sprains and broken fingers or wrists.Ergonomic & ambidextrous design makes it suitable for men women, seniors, teens and pre-teens, and children, depending on age. Description:Fit for building wrist,forearm strengthFit for climbers, martial artists, athletes and anyone who wants to improve their hand strengthBy increasing the resistance,it will eventually allow you to build hand strength Specification:Material: Aluminum & ironColor: silvery, goldSize: 12.5cm10cm1.8cmType 100lbs 150lbs 200lbs 250lbs 300lbs 350lbsStrength 45kg±5 67kg±5 90kg±5 112kg±5 135kg±5 157kg±5 Package included:1 x Fitness Heavy Grips Note:Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.Please allow slight deviation due to manual measurement. Thank you!