A roller massager is a handheld tool used for massaging different parts of the body, particularly the muscles. It is typically made up of a roller with a textured surface that is designed to apply pressure to specific points of the body, such as the back, legs, or arms. The roller can be moved back and forth over the target area to help reduce muscle tension, increase blood flow, and relieve pain. Some roller massagers may also include additional features such as adjustable intensity settings or vibrating mechanisms for a deeper massage experience. They can be useful for athletes, individuals with chronic pain, or anyone looking to relax and relieve muscle tension.