Carpentry Woodworker 20mm Diameter Forstner Tip Hinge Boring Bit
Precision ground for heavy use and easily resharpened, it can enlarge existing holes with ease and can bore any arc of a circle. Carbide tip is specially designed to pass through hole cleanly in end grain and thin stock, great for boring concealed hinges and door clocks. Should work with an electric drilling tool, which is not included here.