Drop in anchors are used for anchoring into solid concrete. As the the bolt is tightened, the sleeve dilates against the substrate. Drop-in anchors are made of carbon steel for long lasting durability and dependability. Anchors are designed to secure material or structures to concrete. Fasteners accommodate handrails, lighting fixtures, piping, and more. Features - Color: Silver. - Material: Carbon steel. - Size: 2.50 x 2.50 x 0.70cm/ 0.98 x 0.98 x 0.28 inch. - The premium knurled drop in anchors. for solid concrete. - Internally threaded, all steel shell. Below surface setting for easy patch work. - Lipless drop-in anchor, higher performance potential with deep embedment setting. - Drop-in anchor provides a secure hold within solid masonry and solid uncracked concrete. - Carbon steel body expands within the mounting surface to secure the anchor in place.Package list: 50 x expansion anchors