1. [DURABLE AND DEPEDABLE]: This hand grip strengthener is made of heavy-duty plastic and metal alloy materials. It is sturdy and durable, which is great for building hand strength and stretching muscles. Exercise hand strength grips can be easily adjusted from 5~40kg 2. [FITS ALL HAND SIZES & PORTABLE DESIGN]: No matter whether you’re a woman or a man, kids or adults, beginner or an experienced person, you can start grip training anytime and anywhere. Suitable for all age groups and fits well for all hand sizes. This hand gripper is made of lightweight and high-quality materials so that you can easily put them in your bag, or pocket and carry them anywhere. 3. [ADJUSTABLE RESISTANCE & PORTABLE PERSONAL HOME GYM]: Adjustable resistance, you can adjust it from 5 kg to 40 kg according to your need. Can be done at home or in the office with just 5-10 minutes per day. Perfect for athletes, musicians, rock climbers, tennis players, etc. 4. [TPR HIGH ELASTIC HANDLE]: Manufactured using high-quality TPR materials and over-mold manufacturing processes. The exquisite manufacturing process makes the handle safe and non-slip, soft and comfortable, wear-resistant, and not easy to fade, without odor. 5. [MULTI-PURPOSE]: The hand grip strengthener forearm grip is perfect for improving strength, power, and speed in the wrists, fingers, and forearms. It is not only the best choice for rock climbers, tennis players, athletes, and musicians to enhance the flexibility of their fingers and wrists. Read Less