pretty nice product for being plastic. came with machine bolts to mount them so be sure you get the threaded inserts yourself to put into your cab roof in order to mount these. all my inserts broke off when I removed the old ones, so I opted to use lock nuts that I got in order to mount them. they seem bright enough to get the job done and I'm happy that they draw much less current than the regular bulbs that I had before. looking forward to the longer lasting durability of LED products and a lot less bulb changing!!!