What is a lag screw typically used for?

• A. Securing metal components to wood
• B. Joining small pieces of wood with a screwdriver
• C. Joining large pieces of wood with a wrench
• D. Fastening sheet metal to wood

Answer: (C)

A lag screw is designed specifically for joining large pieces of wood together and requires a wrench for installation due to its size and threading. It features a thick, heavy-duty structure that provides strong holding power, making it ideal for applications where substantial force and stability are needed, such as in construction and woodworking projects involving large timbers or heavy loads. The threads on a lag screw are coarse, allowing it to grip the wood securely, preventing any loosening over time.

The other options primarily outline different fastening methods that are typically suited for smaller or lighter components, or involve materials that don't necessitate the robust characteristics of a lag screw. For example, securing metal components to wood could more commonly employ different types of screws or fasteners better suited for that purpose, while joining small pieces of wood typically involves standard screws that can be driven in with a screwdriver rather than the heavier lag type. Fastening sheet metal to wood also generally requires specialized fasteners designed for those specific materials.