Rivet Nut Tool Kit, Number of Pieces 152, Number of Rivet Nuts 150, Tool Types Included Rivet Nut Installation Tool, Thread Size M4, M5, M6, Rivet Nut Length 240 mm, Rivet Nut Material Aluminum; Steel, Finish Plain, Mandrel Sizes Included M3, M4, M5, M6, System of Measurement Metric, Includes (50) Inserts, Nosepiece Sizes Included M3, M4, M5, M6, Rivet Nut Types Included Rivet Nut