The Aerosmith Sleeve Anchor Carbon Steel is an all-steel pre-assembled heavy-duty mechanical anchor that can be used in a variety of solid base materials. Most popular base materials include concrete and masonry. They are available in multiple head styles, such as, hex nut, acorn nut and flat head to give you the finished appearance for your specific application. Simply drill the same diameter hole as the anchor and install anchor through fixture and then tighten to required torque specification.