Plastic Conical Anchor Kit. Anchor size #10, #12. Screw type B. Bit size 1/4". Light-duty, multi-size anchor for use in concrete, block, tile and brick. Use with sheet metal, woodand lag screws. Has collar for hollow materials. Moisture and chemical resistant, for indoor/outdoor use. Anchor kits include 100 anchors, 100 screws and one masonry bit.