DURABLE QUALITY: chest expander made of High quality PP and carbon spring wire, high tensile strength, and Eco friendly anti skid handle to keep you preventing hand from falling off the chest exerciser .ADJUSTABLE AND MULTIPLE FITNESS LEVELS: chest expander have 5 steel spring, each spring load 174N, easy to detach or reattach the latex tubes for different strength intensity .PERFECT BODY EXERCISER: Training arm, chest, shoulders, back, your whole upper body .COMPACT AND HANDY: Lightweight, simple structure is easy to be taken to the office, Gym, camping or traveling, doing exercise anywhere, any MULTIFUNCTIONAL: Chest Expander and hand gripper, 2 in 1 meet your different strength needs .