Features:<br> *High Quality Material: This product is made of high quality material, not easy to break, reusable and durable.<br> *Adjustables: Innovative compression spring, this Grip Strength Trainers can adjust the resistances without changing the grip distance.<br> *Safe use: This Grip Strength Trainers is designed with hiddens spring metal parts to protecting the limbs from injury in all way.<br> *Soft and non-slip: Ergonomic handle design, soft rubber covering the palm contact position, so that your hands will not be rubbed during exercise.<br> *Easy to carry: Portable and lightweight design, you can easily put it into your pocket or backpack, you can carry these handles with you to exercise anytime and anywhere.<br> Notice:<br> 1.Actual color may be slightly different from the image due to different light effect<br> 2.Please allow 1-3cm deviation due to manual measurement<br> <br> Material: ABS+TPR+metal parts<br> Size: 11*15cm<br> Spring diameter: 2.5mm<br> Package List:<br> 1 x Hand Grip Strengthener