A mechanical fastener used to attach thin sheet metals. When applied with a pop rivet gun, the sacrificial shaft is "popped" from the cylindrical, donut-shaped rivet as it is compressed.
http://www.diydoctor.org.uk/projects/Poprivets.htm
http://www.rivetsonline.com/rivet-tools/tool-rivet-kits/blind-rivet-kits-with-tools.html
http://www.diydoctor.org.uk/projects/Poprivets.htm
http://www.rivetsonline.com/rivet-tools/tool-rivet-kits/blind-rivet-kits-with-tools.html