Tourgrip DynaFlex Golf 90043 Grip and Arm Strengthening System Mechanical grip accessory for increasing range and accuracy on the golf course Patented handle is shaped like a golf clubs grip for better handling Internal motor reaches up to 9, rpm and 25 pounds of torque resistance Builds strength and conditions arm, wrist, forearm, and triceps muscles Aids in rehab for carpal Tunnel and finger, hand, wrist, or Elbow injuries Mechanical grip accessory for increasing range and accuracy on the golf course Patented handle is shaped like a golf club grip for better handling Internal motor reaches up to 9,000 rpm and 25 pounds of torque resistance Builds strength and conditions arm, wrist, forearm, and tricep muscles Aids in rehab for carpal tunnel and finger, hand, wrist, or elbow injuries