CobraTork 5/8 in. x 6 in. Mechanical Galvanized Concrete Screw Anchor (2-Pack)
Cobra Anchors. $19.99. In stock.
This heavy duty concrete screw anchor features a raised head for better grip. A notched thread makes it easier to cut through the concrete and cavities are designed to collect the debris. Also, the anchor can be easily removed if required.