Carbon Steel expansion anchor bolts concreteThe Wedge Anchor is a fully threaded, torque-controlled, wedge expansion anchor which is designed for consisent performance. It is suitable for applications in solid concrete and grout-filled concrete masonry. Drill Diameter is the same as Anchor Diameter. For matched tolerance drill bits and Concrete Drilling Machines see Carbide Bits and Power Tool Sections.General Applications and UsesStructural Anchorage, Seismic Attachments, Retrofit Projects, Machinery Anchorage and Lighting Standards.