Powers Fasteners 05522-PWR 1/4" X 1" Mushroom Head Spike Anchor 100/Box

Mushroom Head Carbon Steel Spike (Tamperproof) - 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.

• Anchor Size: 1/4" x 1"
• Drill Diameter: 1/4"
• Minimum Embed: 7/8"
• Standard Box: 100