Trail Marking Tacks by Allen are highly reflective tacks that can be seen for up to 200 yards, so you don't have to worry about getting lost in the dark in the woods again. Perfect for Hunting, camping, or hiking, or marking important spots, these white-faced tacks can be seen day or night. Easily push into a tree or the ground with your thumb, and the nearly -inch face stands out. You can even leave these tacks on your trail season after season. One pack includes 50 tacks.