The Spike® anchor is a patented, one-piece, tamper-proof vibration-resistant anchor for use in concrete, block, brick 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-expanded, there is no secondary tightening operation required which greatly reduces the overall cost of an anchor installation.

Once seated at the required embedment, residual spring forces developed in the expansion mechanism provides three compression forces at the bottom of the anchor hole. When subjected to vibratory loads, the Spike® will expand due to the residual spring action of the expansion mechanism.