Knob for Quick De-Riveting: Our 16-inch rivet nut tool features a quick de-riveting design by twisting the spindle knob. Effortlessly twist the knob to release the rivet automatically. The 16-inch long handle maximizes leverage and makes riveting a breeze, saving time and effort compared to manual riveting. Sturdy Material for Durability: The professional-grade rivnut tool kit with industrial quality is made from a high-strength alloy rivet setting rod and carbon steel handles that resist corrosion and deformation. The ergonomic rubber handle ensures a non-slip and comfortable grip, providing stable and robust support for your daily work or hobby projects. 13 Sizes of Mandrels and Rivet Nuts: Our rivet nut gun kit provides versatility with 13 pcs of mandrels and 186 pcs rivet nuts. The nuts include 20 pcs each for 6 sizes: M3, M4, 10-24, M5, M6, 1/4-20; 10 pcs each for 6 sizes: 8-32, 5/16-18, M8, 3/8-16, M10, M12; and 6 pcs for 1 size: 1/2-13