Hardware handles one of collocation of lock quality judgment
metal shake handshandle collocation of lock start from the surface treatment of products: good sheet to the product surface is very smooth, with very smooth surface treatment. Plate made of poor product is pot-holed even do several layers of surface treatment, too, because the surface of the handle will not fill the product surface defects. Some will also have small air bubbles or yellow and so on. These are all defective goods.
this is hardware handles one of collocation of lock quality judgment