BoneHead Corner Finishers are one of the two most commonly used automatic tools (along with flat finishers). They apply both the bed coat and the finishing coat over both sides of an inside corner at the same time. Drywall Master corner finishers have frames made of solid billet aluminum, extra thick center clips, and military-grade stainless steel to ensure longevity. Available without wheels in 3" and 3.5” size.