The Platinum Corner Box is used the apply joint compound to internal corners with the use of an angle head or corner glazer. The high capacity 8" box allows for longer runs and higher productivity. Built super tough and lightweight out of anodized aluminum. <p>Compatible with the following brands of angle heads:</p><ul><li>Drywall Master</li><li>TapeTech</li><li>Columbia</li><li>Level5</li><li>NorthStar</li></ul>