New Powerspin Evo Arm, Tricep & Shoulder Workout (Purple)

Powerful, efficient, effective - Powerspin is an upper body & arm exerciser which rapidly tones or builds muscle depending on the spin speed of the internal steel ball (no battery required).
This simple device utilises isometric resistance to quickly engage a higher percentage of muscle fiber compared to regular isotonic free weight training.
Small, light and portable, this fantasti...