Wedge anchors, also known as "floor bolts", are a general purpose high strength floor anchoring device. They are made for use in solid concrete, not hollow walls. Applications include steel fixtures such as pallet racking and railings. The hole is drilled out to the same size as the anchor, the anchor is driven in, and the expansion sleeve expands, holding the anchor in place. Made from zinc plated carbon steel which provides strength and mild corrosion resistance. Each anchor comes with a nut and washer to complete the installation.