Features: 1.Simple Operation - No need for complicated installation steps or professional guidance to start working out 2.Three-stage strength adjustment function, the strength range is 45-70-90lbs, to meet the needs of different training intensity 3.Made of steel and thickened steel tube, it has excellent durability and stability, not easy to break or deform, can be used for a long time 4.Equipped with non-slip handles, providing a comfortable grip, ensuring stability and not easy to slide during the workout, increasing the safety and comfort of the user 5.This adjustable twist arm trainer can effectively shape the muscle lines of the arms, biceps and triceps, chest, abdomen, shoulders, back, and legs, improve muscle tension and blood circulation throughout the body 6.Detachable design, compact and lightweight, easy to carry, store and use outside Specification: Material: Iron core tube + Steel spring + NBR foam Weight: 1.6kg Product size: 26.5in x 6.7in Colour: Black&Blue Adjustable strength: 1Level:Within 45lbs, 2Level:Within 70lbs, 3Level:Within 90lbs Target audience&scenario: The adjustable twist arm exercise device is suitable for a wide range of people, including fitness enthusiasts, office workers, home users, etc. It can be used in various scenarios, such as home fitness, gym training, office exercise, outdoor exercise, etc Packing List: 1x Adjustable Twister Arm Exerciser, 1x Quick-Start Guide