- One-step rivet nut installation: drill the hole in the workpiece, mount the rivet nut on the tool, insert it, and crimp to secure. Ideal when the surface is too thin to thread or back access is restricted. - Detachable operation and protection: tool includes a mandrel knob to detach the rivet nut from the mandrel after tightening. The stop lever limits the opening of the handles after the nut expands to prevent deformation of the nut threads. - 86-piece complete set: includes 5 mandrels with nosepieces M3, M4, M5, M6 and M8 and 80 rivet nuts: M3 (20), M4 (20), M5 (20), M6 (10), M8 (10), covering common sizes and applications. - Durable material: rivet nuts are made from aluminum alloy for long life, reliability, and consistent performance. - Practical applications: ideal for automotive body panels and other thin sheet metal where threading is impractical; mounting brackets or hardware on electrical enclosures with limited back access; attaching accessories to thin bicycle or motorcycle frames.