Wedge anchors are designed for anchoring fixtures into solid concrete or grout filled masonry. These anchors work by inserting them into a hole drilled into concrete and tightening the nut against the fixture. The three prong wrap around clip slides down and is then expanded, wedging itself securely in the concrete. Our wedge anchors have a chamfered threaded end for ease of starting nut and a heavy duty three prong wrap around clip to secure tightly against the concrete.