Strauss Chest Expander with 5 Springs and Wrist Exerciser, Black Durable wrist strengthener and comfort: This wrist strengthener is made of heavy duty carbon steel spring, which is stainless and durable soft and thicken foam minimize hand grip No assembly required adjustable stabilizer pad for regular or reverse wrist curls, the adjustable anti-resistance nylon ribbon for both small and large hands, men and women Forearm and wrist support for maximum safety and comfort lightweight for easy transport, quick and comfortable to use anytime, anywhere Portable upper-body workout equipment for exercising any-time, anywhere. Made with chrome steel and wooden handles for enhanced quality and durability. Maximum Pulling range 150 cm including the grip. Maximum Pressure 30 Kgs each spring could subject to max 6 Kgs pulling force.