Since 1989, Kestrel has been a global provider of the finest quality interior and exterior window shutters and doors. We are consistently specified for commercial and residential properties, for new construction and historic restoration. --------------------------------------------------------------------------------Each window shutter, closet door and folding room divider screen is made to order for you here in southeastern Pennsylvania. We start with only the finest quality materials milled to precise tolerances. Frame components are joined with true, deep pocket mortise and tenon joints, then pegged to ensure strength and durability for generations.