Lag screws, also known as lag bolts, are heavy-duty fasteners used primarily in wood construction. They have a thick, coarse thread that provides a strong grip in wood, making them ideal for securing large wooden structures, such as decks and beams. Lag screws typically require a pre-drilled hole to ensure proper installation and to prevent the wood from splitting. These fasteners come in various lengths and diameters, allowing for versatility in different applications. Lag screws are often used in conjunction with a washer to distribute the load and enhance stability. Their robust design makes them suitable for both indoor and outdoor projects, ensuring durability over time.