What is this?These thread adapters are suitable for threaded lamp pipes. Widely used for repairing pendant lights, chandeliers, electrical parts, or making other lamp projects.Are there any advantages of the product?Made of iron material, zinc coated, with good strength and rust resistance. Thread reducing nut mainly for converting 2 different threads, very convenient.How to use it?All thread design, easy to screw into threaded nuts or threaded screws.What should I notice?Please check the thread size before buying to make sure it will fit your project.