Arm pulling resistant band with detachable spring steel for adjustable resistance. Easily find and set the proper strength you want for your workout. Chest Expander. Chest Expander with ergonomic antislip handles for a comfortable, secure grip. Pectoral Muscle Training Equipment. Detachable spring exerciser is lightweight, easy to transport and store. You can exercise at home or in the office. Chest Expander. Pectoral muscle training equipment designed to reduce stress on wrists and forearms compared with most other chest exercisers. Chest Expander. Key benefits and features Adjustable resistance: The detachable steel springs allow you to adjust the intensity according to your fitness level and progress. Comfortable grip: Ergonomic antislip handles offer a secure and comfortable hold during chest and upper body exercises. Portable and easy to store: Lightweight design with a detachable spring module for convenient transport and storage at home or work. Wrist and forearm comfort: Designed to reduce stress on wrists and forearms compared to many chest exercisers, enabling longer and more comfortable sessions. Use scenarios Home workout: Use for chest expansion, pectoral training, and upperbody exercises as part of a regular routine. Office breaks: Quick, 5 10 minute routines to relieve chest and shoulder tightness during long workdays. Travel and gym sessions: Lightweight and portable, fits in a bag for workouts in hotel rooms, gyms, or studios.