Multi-functional spring exerciser, also known as a chest expander.
It combines a chest expander, hand grip strengthener, and sometimes a foot pedal for varied exercises.
The device typically features multiple (often five) removable steel springs to adjust the resistance and intensity of the workout.
It is designed to help build pectoral muscles, strengthen arms, shoulders, and wrists, and tone the waist and abdomen.
The equipment is lightweight, portable, and suitable for home fitness routines or physical recovery from injury.