1/4" x 0.485" Shank, 0.525" x 0.099" Dome Head, 0.126 to 0.25" Grip Range, Aluminum Rivet/Steel Mandrel, Closed End, Rivet Rivet Type Closed End Shank Diameter 1/4 Inch Mandrel Diameter 0.144 Inch Shank Length 0.485 Inch Head Type Dome Head Diameter 0...