Direct Replacement Knob for MasterCraft Quick Release Tower Mirror Bracket found on the Zero Flex Flyer towers (ZFT), seamlessly replacing OEM 530569.This tower mirror was featured on X series boats from 2005 to 2011 and was utilized on boat models X-1, X-2, X-7, X-9, X-15, X-25, X-30, X-35, X-45, X-55, X-80, and X-Star. This knob is essential for attaching and detaching the factory-matched mirror mounted to the forward tower leg on the driver's side. The mirror must be removed to fold the front tower legs down. This small screw is frequently misplaced or dropped into the lake.