Anchor mounts flush into a wall, ceiling, or floor to securely hold a load in solid concrete, brick, and stone * Corrosion-resistant polypropylene body expands and elongates within the mounting material when a screw is inserted to distribute force evenly for a solid grip * Made in USA, and works with #10 to #18 screw sizes (sold separately) * Ultimate tensile strength is 1,168 lb. in 3,500 psi concrete with a #14 sheet metal screw * Use one-fourth or less of listed maximum values for safe working loads (as required by local regulations)