Red Head wedge anchors are heavy-duty, zinc-plated, steel anchors designed for fastening applications in solid concrete. They are ideal for attaching 2 x 4s, sill plates, and electrical equipment. Other common applications include attaching structural supports to concrete, tilt-up construction, highway rails and posts, HVAC and plumbing systems, metal doors, and window frames. They feature a versatile fully threaded design, which is standard in sizes up to 3/4 in. x 10 in. and a corrosion resistant, one piece stainless steel clip. Red Head wedge anchors are code recognized for use in uncracked concrete