Package Include --- 2 packs Black/Green hand grip strengthener, the dimension of the hand grip strengthener is 13cm * 8.6cm(H * W) Sturdy And Durable --- Made of high quality steel spring and aluminum handle. Ergonomically designed. Double-layer thickened sponge, easy to absorb sweat and anti-skid, can better control the grip. Lightweight And Portable --- The compact design makes it easy to put the grip in your pocket or backpack, allowing you to exercise your hands anytime and anywhere. Such as office, at home, outdoor walking and travel, etc., easy to carry. Wide Range Of Applications --- Our grip strength trainer fit for all male and female hand shapes, can be used to exercise the strength of wrists, forearms and fingers. Daily exercise can promote blood circulation and relieve pain.