Rivet Nut Tool, 16” Rivnut Tool Kit with 13PCS Metric and SAE Mandrels, 186PCS Rivet Nuts, M3, M4, 10-24, M5, M6, 1/4-20, 8-32, 5/16-18, M8, 3/8-16, M10, M12, 1/2-13, Semi-auto RetractionRivet Nut Tool, 16 Rivnut Tool Kit with 13PCS Metric and SAE Mandrels, 186PCS Rivet Nuts, M3, M4, 10 24, M5, M6, 1 4 20, 8 32, 5 16 18, M8, 3 8 16, M10, M12, 1 2 13, Semi auto Retraction Product Features Semi Auto De Riveting for Efficiency Our 16 inch rivet nut tool features a connecting rod semi automatic de riveting design. Just open and close 2 3 times, and it automatically releases the rivet. The 16 inch long handle provides optimal leverage,