This item is a fitness equipment with simple exercise equipment that allows you to sit at home or in the office for a long time, and recently, it is popular to train your chest, shoulders, and arms with a simple elastic band, making beautiful forearm lines for men and biceps. This product is equipped with a semi-automatic tape-type circular drum-structured attachment with a coal briquette band in an office or a chair where you can easily and easily exercise anytime, anywhere.