Quantity per box: 1,000 - - Phillips Flat Concrete Screw Reduced Head Bronze Bulk 1/4 X 3-1/4 BC-1452CNPFRWB
Cuts its own threads and when used in concrete, block or brick. Eliminates the need for an anchor when used in light or medium-duty applications. When used in concrete, it can be removed and re-driven into the same hole. Special carbide bits are recommended for driving concrete screws into masonry. Some applications include anchoring the following to masonry: electrical junction boxes, wooden beams, plywood, exterior insulation, metal flashing, thresholds.