The Hammer-Set one-piece zinc plated steel anchor consists of an expansion body and expander drive pin. Anchors meet or exceed GSA specification A-A-1925A Type 1. (Formerly GSA: FF-S-325 Group V, Type 2, Class 3)
Buy it, you won't regret it. It's great purchase, it's worth the purchase. This 1/4"" X 1"" Hammer Set (Box of 100) from Red Head is just awesome.