Conical plastic anchors are recommended for quick, easy fastening of fixtures in a variety of light duty applications from drywall to concrete. Also known as wall plugs, these anchors expand when installed to reinforce the hole and resist stripping. Pre-drilling is required, masonry drill bit included. Insert anchor flush with surface. Not recommended for ceiling applications.5/16 x 1-3/8 in. conical plastic anchors 50-piecesCombo phillips/slotted pan tapping screws zinc 50-piecesIncludes masonry drill bit 1-pieceReusable plastic carrying case