Lead wood screw anchors a hollow, cylindrical anchor which is split from the bottom up for the majority of its length and has longitudinal ribs for part of its length. The diameter at the split (bottom) end is tapered; the top end is flared to a wider diameter than the remainder of the anchor's body. Lead wood screw anchors are used with wood screws, lags and tapping screws for light duty applications in brick, block, drywall, masonry or concrete. Lead wood screw anchors will conform to irregular, out-of-round holes.