Coach Screws. This is the main category in this series

• Heavy-duty threaded fastener with a hexagonal head designed for high-strength applications, particularly in timber.
• Features a tapered, pointed tip and coarse, deep threads that provide a strong grip for secure connections in materials like wood, and sometimes masonry. They are used for tasks like building decks, retaining walls, and other structural joinery.
• Also known as a lag screw.