3. Variety of Sizes and Coatings These screws come in a range of sizes and diameters, allowing builders to select the best fit for their specific application. Additionally, various coatings are available to match the aesthetic qualities of roofing materials, further contributing to the screw's versatility.

Metal expansion nuts, often referred to as expansion anchors or expansion inserts, are specialized fasteners that expand when a bolt or screw is threaded into them. They typically consist of a cylindrical body with slits along its length or an expandable design that facilitates outward expansion. The main purpose of these nuts is to create a secure grip within a substrate, such as concrete, wood, or metal, thereby preventing loosening due to vibrational forces, temperature fluctuations, or stress.

Another noteworthy feature of chemical anchor fasteners is their versatility. They can be used in various settings, including in cracked and uncracked concrete, brick walls, and other masonry substrates. Furthermore, these anchors can often be installed in holes that are drilled with specialized tools, allowing for greater flexibility in construction designs and reducing the risk of damaging surrounding materials.