Features 1. Strength enhancer at home: The twisting arm exercise device is designed specifically for effectively exercising the upper body, which can increase training effectiveness by 40%, targeting the chest, shoulders, forearms, biceps, and thighs for exercise. 2. Durable structure: This chest muscle trainer is made of sturdy steel and can withstand high-intensity training. Leather sheath makes exercise safer. 3. Easy to carry and fold: Easy to assemble or disassemble, very stable, compact in size, easy to store and transport, can be packed in a bag, car trunk or office drawer, it is a convenient sports equipment for family travel or office. 4. Adjustable resistance: By adjusting the installation distance between the spring rod and the grip, customize the exercise width and resistance size. Achieve your exercise intensity, enhance muscle strength, and improve athletic performance. SpecificationSelect: 66-88LB, 88-110LB Name: Multi functional arm strength device Material: Stainless steel spring, foam Size: 65-68CM (adjustable first and second levels, different lengths) Package Include: 1x Twisters Arm Exerciser