Lenox® Pilot Drill, Replacement, 3L/5L/6L/7L Arbor, Hex Shank, 1/4 in Shank, 1/4 in Pilot Drill Size, 3-1/4 in Overall Length, Split Point, Carbon Steel Cutting Edge, Carbon Steel, Black Oxide, Applicable Materials: Concrete, Drywall, Masonry and Wood