Hillman 1/4 in. D X 1-3/8 in. L Steel Acorn Head Sleeve Anchors 50 pk

Concrete Sleeve Anchors' design allows them to anchor into concrete, brick, and block. Turning the nut pulls the working end of the sleeve anchor up through the material. It expands and anchors itself securely in the base material. Sleeve anchors have many uses, including but not limited to frame installations, electrical and mechanical attachments, and masonry applications. The acorn head is easy to grip, and the sleeve design provides a clean, finished look.