Simpson Strong-Tie's 5/8 in. x 2-1/2 in. Drop-In (DIAB) Internally-Threaded Zinc-Plated Anchor (25 Pack) is suited to applications including suspended fixtures, pipe and conduit supports, electrical installations, mechanical equipment, and other concrete-mounted components where a flush-set female anchor is preferred. The internally threaded configuration allows installed hardware to be removed or replaced without disturbing the anchor, making drop-in anchors useful for serviceable installations. Proper hole diameter, embedment depth, and installation with the manufacturer's specified setting tool are important for achieving the anchor's intended performance in concrete.