The MAIDOMA Twister Arm Trainer engages multiple upper body and core muscles (chest, shoulders, arms, back, abs) via composite motion training to boost strength and shape. It features 3 customizable resistance levels (20–60 lbs) for all fitness stages, while padded non-slip foam handles and leather-wrapped metal construction ensure a secure, sweat-absorbent grip. Compact, lightweight, and easy to install/disassemble in 3 steps, it's perfect for home, office, travel, and active lifestyles. Made with durable high-strength metal springs, it also comes with thoughtful customer service for a smooth experience.