The Hilti line of Nylon Flat Head Philips Impact Anchors with Screw let you get your fastening project accomplished quickly and efficiently. The quick impact installation is performed using a hammer and the hammer-driven screw can also be driven or unscrewed with a screwdriver. The Impact Anchor's expanding head opens in the hollow base material, providing a reliable keying effect. Applications most commonly completed with these Hilti Anchors are fastening trim strips, battens and components for electrical and plumbing installations, and anchoring concrete, brick ties and masonry. Get the impact Anchors that professionals use: the Hilti Nylon Flat Head Philips Impact Anchors with Screws.