This brush delivers the ultimate in flexibility， performance and durability to provide professional results and make it easier to complete your project. This professional quality angle sash paint brush is handcrafted with a precision blend of nylon and polyester filament and a quality metal ferrule for use with all paints and stains. Sash angle paint brushes are ideal for painting edges， corners and straight lines. Use this brush with both acrylic and water based paints and stains or oil-based paints and stains.