Blind pop rivets also referred to as pop rivets are generally used for blind fastening of two or more pieces of material where there is limited access to the blind or rear side of one of the parts to be joined and consist of a rivet body which is the visible accessible side and the stem or mandrel which extends through the rivet body and is pulled during the application to secure the item. The material make up of pop rivets vary depending on the application and the stem or mandrel and the body, shell or hat can include Aluminum Body/Aluminum Mandrel pop rivets, Aluminum Body/Steel Mandrel pop rivets, Stainless Body/Stainless Mandrel pop rivets, Stainless Body/Steel Mandrel pop rivets, and Steel Body/Steel Mandrel pop rivets.