Hillman 1/4 in. Dia. x 1-1/2 in. L Plastic Pan Head Ribbed Anchor Kit 101 pkRibbed plastic anchors work with various diameter sheet metal screws and are ideal for anchoring in concrete, brick or wallboard. The anchor is corrosion resistant. A pre drilled hole is required. Recommended for quick, easy fastening of fixtures in a variety of light duty applications. * Works well in hard surfaces and hollow surfaces where no studs or beams are behind the surface Can be used in base materials such as brick, concrete, hollow block,