Self-drilling screws are specialised fasteners with a drill bit-like tip that allows them to create their holes and form threads as they are driven into materials. They are particularly effective for securing metal roofing sheets and cladding to structures, commonly used in construction and manufacturing. These screws offer the advantage of eliminating the need for pre-drilling, saving time and labour costs, and ensuring a secure, watertight connection. Available in various sizes and materials, they suit different applications. However, they can be more expensive than standard screws, and improper use may lead to over-drilling and material weakening.