These are a brushed billet center cap replacements. They are machined down to the same finish as the polished then brushed afterward. These look much better with a standard factory wheel that hasn’t been high polished! As the factory caps are not longer available and brittle. They pop in and out just like the factory center cap without the possibility of bending or breaking. They are an upgraded design with an Oring to hold them in instead of the locking fingers. The fingers wear out overtime and cause sloppiness or the cap can just fall out. Add a little smear of grease before installing them to ease of installation.