Review on FREELICHT 12-Pack 4 Inch Slim LED Recessed Lighting with Junction Box - Ultra-Thin LED Downlight, 5000K Daylight, 9.5W=80W, 650LM, Dimmable Wafer Can-Killer Downlight - ETL Certified by Justin Rasmussen

Am I missing something? "108mm" from what I know now is just over 4 1/4". It doesn't matter if you use it in drywall build it in and you can rasp the difference but I build them in wood and it makes a big difference.The edge overlap is tiny, less than 1/4" so good luck if you can't find a 108mm hole saw. How previously mentioned spring terminals are also poorly designed and poorly manufactured, enough time to reinstall a few springs to offset savings from better light design and construction, however they are very bright, decent looking and easy to hook up Make sure they are dimmed since "bright" means should have a capital "B".