Features: Foolproof Locking Mechanism locks Angle Head on the ball Stainless steel wings last much longer than nickel plated Solid billet aluminum body for long life. Last much longer than cast body. Anodized gun metal color. Wings are engraved for identification (Left and Right) Purpose: Used in 90 degree internal angle joints, after corner roller, to evenly feather compound over tape. Available in the following sizes: 2″, 2.5″, 3″, and 3.5″ Produces a finely feathered finish Longer wear and superior performance Commercial Grade Columbia Angle Heads