Apply a consistent base coat of joint compound for the cleanest and most efficient installation of paper-faced corner bead. The Mud Head applies the correct amount of joint compound to maximize adhesion and reduce clean up. Attach the 16TT Mud Head to a Corner Applicator (35TT or 50TT) or the 14TT MudRunner® to simplify and accelerate installation of paper-faced corner bead for external (outside) drywall corners.