Bullworker ISO 7X Isometric Strength Trainer

Designed for isometric exercises to build strength and muscle definition by compressing or expanding the device. Features a steel construction with resistance springs, along with a red slider to measure and hold contraction levels. Compact and designed for full-body workouts at home, in the office, or while traveling. Accidentally left behind by a previous roommate of mine. I’ve never used it, and it’s been sitting around.