The SPIKE® anchor is a patented, one-piece, tamper-proof vibration
resistant anchor for use in concrete, block, brick or stone. Several
head styles and anchor materials are available. 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.