Wrist-arm-hand strengthener with adjustable resistance from 10 to 60 kg, for the exercise intensity you desire. Durable, sturdy construction that fits any hand size, while its ergonomically designed non-slip handles make usage easy and comfortable. Small, lightweight, and easy to carry. Strengthens wrists, arms, fingers, and hands. By turning the knob back and forth, you can find the ideal resistance for you and the exercises you want.*Color shipment subject to availability.