Anchors create a secure mounting point to attach an item or equipment to a mounting surface. Anchors for concrete, block, and brick install into masonry surfaces and provide a threaded mounting point to secure items into place. Anchors for drywall and plaster attach items onto hollow mounting surfaces without a stud or other structural member. Adhesive anchors, also called chemical anchors, use adhesives to secure the anchor and hold items in place. Rod hangers install into a mounting surface, providing a mounting point for threaded rods and fasteners. Spring anchors screw into a mounting surface or threaded hole and create a point to secure springs, cables, and wires.