Use for fastening into solid concrete. Corrosion resistant, 1 piece stainless steel expander clip. Zinc coating. Some common applications are for structural supports to concrete, tilt up construction, highway rails and posts, bridge construction, pipe hanging and machinery mounts, electrical, HVAC and plumbing systems, metal door sandwindow frames. Not recommended for highly corrosive areas (salt spray) or threated lumber. Drill hole same size as anchor, inset anchor and tighten.