Which nail is specifically designed for temporary fastening?

• A. Duplex nail
• B. Common nail
• C. Drywall screw
• D. Finishing nail

Answer: (A)

Duplex nails are specifically designed for temporary fastening due to their unique characteristics. They have a double head, which allows them to be driven into materials and then easily removed, making them ideal for temporary construction, such as when framing structures or forms that will eventually be taken apart. The second head allows for leverage when pulling the nail out, facilitating the disassembly process without damaging the surrounding materials.

In contrast, common nails are intended for permanent fastening and do not have features that aid in removal. Drywall screws are designed for hanging drywall and provide a very strong hold that is not meant to be temporary. Finishing nails, on the other hand, are used for permanent applications where a smooth finish is desired, as they are typically driven below the surface of the wood and covered with putty. Therefore, duplex nails serve a specialized purpose in temporary applications, making them the correct answer to the question.