1.Material: pp+steel,
2.Appearance:pure of rust
3.Color:all color,
4.Adjust the front knob can change the size of power.
5.The Hand Gripper Strength is used to strengthen forearms, hands, wrists and fingers, great training aids for people who need to practice his or her hand, quite comfortable to grip with plastic handle.
6.Note: Please make an effort to grip the handle tightly in case of accidently springing out to hurt people.