A mechanical drive anchor consisting of a zinc die cast expansion body and zinc plated steel expander drive pin. Hammer-Set anchors are medium-duty anchors designed for a variety of fastening applications in concrete, block, and brick. Use Hammer-Set anchors to attach drywall track, electrical boxes and clips, flashing, lumber and more. Works in concrete, block and brick. Great for fastening electric boxes, conduit clips, roof flashing, plywood and 2 x lumber. Fast, easy installation. Install through material to be fastened. Low profile mushroom head. For indoor and outdoor use. Not for use in overhead applications.