DeWALT® Wedge-Bolt® Screw anchor, Finished Hex Washer Head Drive, Carbon Steel, Minimum Embedment Depth, Drill, Zinc Plated, Self-Threading Head. The Wedge-Bolt® Anchor is a One-Piece, Heavy Duty Screw Anchor with a Finished Hex Head. It is Simple to Install, Easy to Identify and Fully Removable. The Wedge-Bolt® Has Many Features and Benefits That Make it Well Suited For Many Applications in a Variety of Base Materials. The Anchor is Designed For Consistent and Reliable Performance in Cracked and Uncracked Concrete.