Automatic Taping Tools are more powerful and efficient than traditional hand tools. Whether you're a drywall professional, remodeler, or DIY, automatic taping tools achieve better results in half the time. Drywall Compound Applicator Heads (Mud Heads) are designed to apply joint compound to flat seams as well as the inside and outside of corners and angles. Compound Applicator Heads are also used to apply mud compound for tape-on cornerbeads. They are available for 90° square corners, Offset 45°, and 135° corners. All-Wall offers the largest selection of Compound Applicators from top brands such as TapeTech and Columbia.