This item is a Power Twister Bar (also known as an arm blaster, arm bar, or chest expander). It is a piece of fitness equipment used for strengthening the upper body.
Key features include:
It uses a heavy-duty spring to provide resistance.
It is ideal for exercising the chest, shoulders, forearms, biceps, and arms.
The resistance levels vary, commonly available from 20kg to 60kg, to suit different strength levels.
It is lightweight and portable, suitable for use at home, the office, or while traveling.