Exercise: Mainly global rehabilitation and hand muscle training. Ergonomic design: This finger stretcher is ergonomically designed so that with proper adjustment, it can work for everyone. Hand yoga prop: Hand yoga is mainly used for rehabilitation and exercise of the whole hand. Fingertip accessories have different voltage levels. Convenient: The more you open your, the more silicone tension is applied. This product only needs to be replaced and can be used with two hands. Specification:Name: Hand grip accessories book: 20 lbsMaterial: Silica Gel Color: Gray Packing List: 5 x Hand Puller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing.