... exerciser,cardio twister 1Type: Power Twister 2Material: Steel Spring Spring power twister,power twister exerciser,cardio twister Power TwisterMaterial: ... Carbon spring steel wiresWeight: 30KG, 40KG, 50KG, 60KGMuscle exercise ... increase in the wrist and arm strength, fitness training is an essential supplies.Packing way:color boxSize: ...