Rivet Nut Tool Kit Number of Pieces 4 Number of Rivet Nuts 0 Tool Types Included Rivet Nut Installation Tool Thread Size M3 M4 M5 M6 Rivet Nut Material Aluminum Steel Finish Plain Mandrel Sizes Included M3 M4 M5 M6 System of Measurement Metric Includes (4) Mandrels Molded Plastic Case Rivet Nut Types Included Rivet Nut