Features: * Corrosion resistant, one piece stainless steel expander clip * Supplied complete with nut and washer * Fastens applications into solid concrete * Great for attaching metal doors, window frames, and electrical, HVAC, and plumbing systems What"s In The Box: * Red Head 11270 Concrete Wedge Anchors, 3/8 -In. X 3-3/4-In. - 50-Pack