We call this one “flat" because, well it's flat! Its shape covers a wide area for large muscle groups, while its flat top distributes the force of the massage gun, evenly.
The flat round attachment is perfect for medium & large muscle groups. It doesn’t go as deep or as precise as the bullet attachment, but the augmented surface area is really helpful on bulky muscle groups like the biceps.
With this attachment, you don’t have to worry about pounding sore, sensitive muscles such as your calf or deltoids.
It’s ideal for any muscle that has a little more “play” to it.