The top of the product has a ring that can exercise the thumb at the same time, the internal is a design, the force is more uniform. The side of the product is in with the shape of the palm of the hand s- design, will not make your palm feel pain.Great for people with arthritis, carpal tunnel, tendonitis and those recovering from a or broken wrist, or when you are working and typing activities that strain your wrist.The silicone material gives you comfort and durability and provides the perfect design for your hand or finger. The product is reusable and can be washed again and again for frequent and comfortable use.Only a palm-sized hand grip strengthener, easy to put in your pocket, take out anytime, anywhere to exercise their hand strength. Or at work, when the can be picked up to de-stress. Put will not take up space.Pounds: 50lbsize: 11 x 6.6cmMaterial: Siliconecolour: greyPackage Contents:1 x Hand TensionerOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.