Precision machined one-piece stainless steel frames : Provides unmatched durability and a no-leak design with tight tolerances for cleaner corner finishes. Solid billet aluminum body with extra thick clips : Builds long-lasting strength that resists twist and corrosion under heavy jobsite use. Center spring on larger sizes (3″ & 3.5″) : Applies even pressure across blades for smoother, more consistent finishing and reduced frame stress. Multiple size options & wide compatibility : Available in 2″, 2.5″, 3″, and 3.5″ to fit a range of inside corner jobs and works with standard handles and angle head tools. Family Owned: Proudly built by Drywall Master Tools—Chicago family owned and trusted by drywall professionals for decades. The Bonehead Corner Finisher is engineered for durability and precision, delivering smooth, clean corner finishes on drywall and sheetrock. Its one-piece stainless steel frame and solid billet aluminum body ensure long-lasting strength and resistance to twist and corrosion, even on tough job sites. The center spring on larger sizes (3"" & 3.5"") evenly distributes pressure for a more consistent finish and reduces frame stress. Available in 2"", 2.5"", 3"", and 3.5"" sizes, this tool fits a wide range of inside corner jobs and is compatible with standard handles and angle head tools. Built to withstand heavy use, this tool combines reliability with top-tier performance, making it a must-have for any drywall professional.