Hillman 1/4 in. D X 1 in. L Zinc Truss Head Truss Head Anchor 4 pk

A Truss Head Anchor is a fastening system that consist of two parts. It is installed by inserting the nylon shank into a pre-drilled hole and hammering the head of the nail until it meets the head of the anchor body. Driving the nail expands the split ends and allows the ribs to grip the wall of the hole. *