Hilti 260345 1/4-Inch x 2 1/16-Inch Nylon Flat Head Phillips Impact Anchors with Screw, 100-Pack Quick installation using a hammer The hammer-driven screw can also be driven or unscrewed using a screwdriver Fastening components for electrical and plumbing installations Light-duty fastening into a variety of base materials Anchoring concrete, brick ties and masonry