JP Power Twister are great for arm, shoulder and chest exercises and are ideal for building strength in the upper body.

Features:

Highest Quality Carbon Steel Springs with Non-Slip Plastic Handle
Internal and External Double Spring Flexible Design, Million Bend Test
Power Twister Original JP, Heavy Duty Tension is perfect for building your hand, Wrist, Fore arm, Bicep, Tricep, and Back Muscles.
Heavy duty High Grade music Wire 6.1mm, Black Grip and Spring
The High-Density Braided Safety Wristband Effectively Prevents Breakage
Rubber handles are anti-slip designed for excellent grip
Portable: Approximately 2 feet long and weighs less than 4 pounds
Silent: Quiet tool enabling a workout without disturbing others
Variable Exercises: Perform a variety of exercises to workout different muscle groups
Tension size: 20kg-60kg, 5 sizes to choose from
Buy with Confidence with 30-days money back Guarantee