The Double-Headed Nail (Duplex Nail)

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What happens here

The presenter introduces a double-headed nail, commonly known as a duplex nail, asking if the viewer has 'ever seen a nail with two heads.' He explains that this type of nail is specifically designed for temporary construction applications, such as concrete forming, where easy removal is crucial. The nail is driven in until the first head is flush, leaving the second head exposed for simple extraction. A demonstration shows both driving the nail into wood and then effortlessly pulling it out using the hammer.

Goal: Explain and demonstrate the use of double-headed nails for temporary construction.

Tools and materials

Double-Headed Nail — Temporary construction, concrete forming
Hammer Boss Hammer — Driving and extracting the duplex nail
Wood — As a surface for the demonstration

What they say

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larger area. These nails are great for house wrap and roofing underlayment. Have you ever seen a head with two nails? This nail is used in temporary construction and often used in concrete forming. When you drive it all the way in, that second head catches, but it still leaves you a little bit, so you're able to pull it out. These are aluminum trim nails. They are corrosion resistant, and the colored heads help them blend into your trim. These are primarily used for trim and

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