It is very simple to use and convenient to carry.
High quality aluminium alloy handle makes it very durable.
Carbon steel spring makes it has good elasticity.
An excellent training tool to strengthen your hands, wrist and forearm.
You can start with a lower level to a higher strength level.
GFGHH Spring-Grip Hand Grip Arm Strength Finger Expander Hand Fitness Gripper - B07NZ69NMQ