Simpson Strong-Tie's 1/4 in. x 3/8 in. Drop-In Internally-Threaded Stainless-Steel Anchor (100 Pack) is engineered specifically for use in concrete and provides a female-threaded connection that can be used with compatible 1/4-20 fasteners. The stainless-steel body is suited to applications where greater corrosion resistance is needed than standard zinc-plated anchors can provide. Its short 3/8 in. length is designed for shallow embedment applications, while the internally threaded configuration permits removable attachments without leaving a projecting anchor above the concrete surface. With 100 anchors per package, it provides a practical fastening solution for repeated installations involving electrical, mechanical, plumbing, and general construction components.