This hand grip strengthener Features adjustable resistance, great for improving the strength of your wrist, fingers, hands, and good for muscle building. Features: Adjustable resistance from 5kg to 60kg (11lb - 132lb) as needed. Ergonomic soft TPR rubber handle provides a comfortable, nonslip grip. High-strength plastic frame with stainless steel spring for long-lasting durability. Help improve the strength and flexibility of forearm, wrist, finger, hand, and muscle building. Specifications: Material: PP and TPR Color: Black or Blue or Grey or Black and Red (optional) Size: 15 x 9.4cm or 5.9 x 3.7in Package Size: 16 x 10 x 2cm or 6.3 x 3.9 x 0.8in Weight: 155g or 5.5oz Package List: 1 x Hand Grip Strengthener Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store