Extra Length Aircraft Drill Bit, Black Oxide, Point Type: 135 DEG, Drill Point: 1/4 IN, Overall Length: 12 IN, Shank Diameter: 1/4 IN, Shank Type: Round, For Steel, Copper, Aluminum, Brass, Oak, Maple, MDF, Pine, PVC, Polycarbonate, Acrylic, ABS, Nylon And Composite Materials