Hand Grips: Improve your strength with an adjustable fitness hand grip. Material: Made from thermoplastic rubber, polypropylene, and strong steel spring. Fully Adjustable: Adjustable strength from 5-60kgs means this hand grip can be used by beginners and professionals alike. Options: Choose from blue, black, or grey - or opt for two random coloured grips. Size: 16cm x 11cm. Adjustable Fitness Hand Grip | Black | Living Social