Come and see our amazing products. Improve the strength of your hands, fingers, wrist, and forearms, perfect for those who have Arthritis, Tendonitis, Carpal Tunnel, and great for musicians, athletes, golfers, rock climbers, and tennis players. Screwing or unscrewing the knob to adjust spring tension from 22 to 132 Lbs (10-60kg). Our compact design allows you to fit it in your pocket, handbag, or gym bag so you can bring your hand Grip with you anywhere. Custome Logo is available; the price for 10000 and over is for sea shipping. Pls confirm with us about the packing info, stock color and exact production time before placing your order.