Expand it in Front Chest.Strengthen Your Wrist Power, Arm Power,Enhance Your Pectoral Muscles. Exercise for 3 Months or More and You will Have Perfect Pectoral Muscles.Finger TrainingPull The Handle.Improve Finger Strength and Increase Finger Flexibility.Keep Practicing for More Than 3 Months, You Can Better Control The Mouse, Ease The Palm Pain Caused by Using The Mouse, You Can Have a Stronger Hand Grip.Tension Size is AdjustableWith a Detachable Design, You Can Automatically Remove One Spring or Add One Spring at Any Time to Get Different Tension.High-Strength Carbon Steel Spring Muscles.Foldable and Portable.
Expand it in Front Chest.Strengthen Your Wrist Power, Arm Power,Enhance Your Pectoral Muscles. Exercise for 3 Months or More and You will Have Perfect Pectoral Muscles.Finger TrainingPull The Handle.Improve Finger Strength and Increase Finger Flexibility.Keep Practicing for More Than 3 Months, You Can Better Control The Mouse, Ease The Palm Pain Caused by Using The Mouse, You Can Have a Stronger Hand Grip.Tension Size is AdjustableWith a Detachable Design, You Can Automatically Remove One Spring or Add One Spring at Any Time to Get Different Tension.High-Strength Carbon Steel Spring Muscles.Foldable and Portable.