Used in temporary applications or in any situation where ease of removal is essential duplex nails, or doubled-headed nails, features two heads instead of one for simple removal. The duplex nail is easier to remove than other nails because its collared design doesn't allow the nail head to be driven flush against the surface, leaving an easy grip to pull it out. Ideal for concrete forming and scaffolding, duplex nails have smooth, uncoated shanks for easy insertion. For concrete pouring applications, these nails are perfect for fastening wood forms for poured concrete. Once hardened, the wood needs removed, and with easy removal of duplex nails, this task is completed much faster. When driving the nail, drive into the head normally, ensuring that the nail goes into the surface up to the first head. This will leave the second head exposed and visible whenever you're ready to remove the forms.