You are buying ten (10) NORS Auveco fasteners. They are round headed dark brown capped push in fasteners for Ford, Edsel, Lincoln, Mercury and Willys vehicles. They have a .525" diameter head and a 9/16" overall length (under head) and push into a 3/16" to 7/32" diameter hole. The stem is 1/4" wide at the widest point.