A corner beading router bit is a cutting tool that is designed to create a decorative edge or molding on the corner of a piece of wood. It is typically used in woodworking applications, such as cabinetry or furniture making. The corner beading router bit is a type of router bit that has a bearing guide on the end of the shank. The bearing guide allows the bit to follow the shape of the wood and create a smooth, even cut. The cutting edge of the bit is shaped in a way that creates a specific decorative profile on the edge of the wood.