Uxcell M10 Thread 7.87 Coupling Nut with Pipe Hex Nut Threaded Extension Rod Kit Black 4 Set

What is this? The M10 coupling nut can connect two M10 all threaded pipes together. It is a common light fixtures accessory kit for the repairing and restoring of ceiling lamps and chandeliers or DIY making. Are there any advantages of the product? Made of metal material electroplated surface with good appearance and durable to use. Easy to use no need for tools. How to use it? Easy to install each coupling nut can connect two pipes on both end. After that use the small hex nut to fasten. What should I notice? Please check the thread size before buying.