The Hillman is 3/8 in. D X 1-7/8 in. L Steel Hex Head Sleeve Anchors come in packs of 25. These Sleeve anchors are the perfect fasteners to use for a variety of applications. The hex head provides a tight fit, and the steel sleeve anchors are durable for long-lasting usage. The anchors are easy to install and remove, making them an ideal choice for professionals and do-it-yourselfers.