Since it's a set of two, you can loosen both sides simultaneously for comfort! It's made of steel, so it's sturdy and allows for pinpoint pressure, which feels great! Highly recommended for effectively loosening areas you can't reach. You can stimulate areas you can't reach with your own hands, such as your shoulders, back, and lower back. Due to the low price, the product will be simply packaged in vinyl. Although it is new and unused, there may be initial minor scratches or stains, so please understand this before purchasing.