A retention fastener includes a body panel and first and second leg members connected to the body panel by first leg member portions. Both leg members co-extend away from a body panel first panel face and have a second portion directed back toward the body panel. The first and second leg members include at least one retention feature connected to the second leg member portion, including: a single tooth wing having a smooth curved surface extending to a single wing retention tooth, and a multiple tooth wing positioned beside the single tooth wing. The multiple tooth wing has individual teeth on a curved surface sequentially increasing in height with respect to the curved surface. The multiple tooth wing is oriented in a superimposed position with respect to the single tooth wing so the individual teeth extend outwardly with respect to the smooth curved surface of the single tooth wing.