ABOUT NEXTACK Just as its name suggest, NEXTACK strive to create continuous solution. At NEXTACK, we committed to produce innovative and quality tools to achieve professional productivity enhancing solutions, which enable our life easier, comfortable, and more efficient. ABOUT NT600 NEXTACK NT600 features 8” high strength carbon steel arms allowing a single hand operating, which is specially designed for tight space or difficult to reach by dual hand riveting. Equipped with a step drill bit, 8pcs SAE and Metric interchangeable mandrels and 80pcs rivnuts, it offers one stop solution for both home DIYers and professional mechanics. DRILL, INSERT, & RIVET Drill your pilot hole, insert the rivet, and squeeze handle to start riveting. Drill, insert, rivet again. It makes laborious tasks like building a deck or putting up a fence go much, much quicker. PRODUCT INCLUDES: 1 x Rivet Nut Gun 1 x Step Drill Bit 8 x Mandrels 4 SAE: 6-32, 8-32, 10-24, 1/4-20 & 4 Metric: M3,M4,M5, M6 80 x Rivet nuts 10pcs/each mandrel 1 x Wrench 1 x User Manual 1 x Storage Carrying Case WARM NOTICE: 1.The step drill bit supplied is suitable for workpiece thickness below 3.5mm. 2.Please select and install right mandrel for your project. Better to practice some rivnuts in the air to know how hard or how far to pull before starting your project. 3.After first squeeze of riveting, it may be not well finished. Please screw in the knob for a 2nd squeeze until perfect riveting. 4.Never point the rivnut gun towards person, including yourself. Keep your finger away from the handle top in riveting.