<p>Saientisi handheld massager comes with 4 massage heads for a different massage experience, you can choose any one you like to meet your needs.</p> <p>Four interchangable head attachment:</p> <p>Round Ball Head: Mainly used for large muscle groups.</p> <p>Flat Head: Suitable for all parts of the body, such as back and leg.</p> <p>Fork Head: Mainly used for spine, neck and shoulder.</p> <p>Bullet Head: Mainly used for joints, deep tissue and trigger points.</p>