Nail in anchors 8×80 are a type of fastener that is commonly used in construction and DIY projects. They are made of steel and have a nail-like head that is driven into a pre-drilled hole. The anchor then expands and grips the sides of the hole, providing a secure fastening. Nail in anchors are typically used to attach items to drywall, plaster, or masonry. 100pieces in a box.