HIKINGWORLD Multifunctional 3 in 1 Fitness Equipment-spring Exerciser,chest Expander.pull-up Bars. Material: high-quality rubber plastic+stainless carbon spring steel wire. Drag springs: 5*15kg max load for each spring. springy and expansive springs reach 1.5meters/59inches. Strong and comfortable streamlining design handles, great tightness,hard to deform. Chest Expander & Hand Gripper & Pull-Up Bars 3 in 1. Easy to install and use. keep your body strong and cool ,fit for all body builder.