Platinum Drywall Tools Outside Applicator Mud Head The Platinum Drywall Tools Outside Applicator Head is designed to fit on all brands of compound tubes, corner boxes and MudRunners© . They dispense ribbons of drywall joint compound to both sides of outside 90 degree angles. This is a great and extremely quick way to fit mud set corner beads. Features:Attaches to all brands of compound tubes and angle boxesStrong and smooth running plastic construction Al’s Taping Tools is the Largest Drywall Tool Store in the World! We are also a fully equipped automatic drywall tool service center with over 35 years in the industry. We sell and service all major brands of automatic drywall tools. All of our service techs are also fully trained in the operation of the tools that we sell and service. So if you are new to automatic drywall tools or have any questions, please give us a call or send us a message. We are here to help. Al’s Taping Tools & Spray Equipment815 Tower DriveMedina, MN 55340