DEWALT Spike 5530 Pin Anchor, 1/4 in Dia, 3 in L, Carbon Steel, Zinc, 100/BX

The Spike® is a one-piece, vibration-resistant anchor for use in concrete block or stone. The Spike® anchor is formed with an "s" shaped configuration at the working end of the anchor to create an expansion mechanism. Since the anchor is pre-formed, there is no secondary tightening operation required which greatly reduces the overall cost of an anchor installation.