Review on Partsam 3 Inch Round Navigation Light: Polished Marine LED Transom Mount Stern 🚢 Anchor Light- 12-5050-SMD, 316 Stainless Steel, IP68 Submersible Boat Marin Led Underwater Cockpit Courtesy Light by Michael Hall

These are pictures of the unusually thick rubber grommet that comes with the kit. It's not glued or anything so just throw it in the trash. It's useless. To flush mount it you will need to drill a hole in the mounting surface if you don't already have one. The included screws are 1.25 inches long and fairly small in diameter. If necessary, you can also use other stainless steel screws. (I don't know if they are still rust free.) Use some silicone around the screw and wire holes. I haven't turned it on yet, but I highly recommend you do so before installing in case it doesn't work. This happens to me sometimes and mostly. I just switch my sea beam on all the LEDs and only time will tell. This is a plastic flashlight case just so you know. If it works, not bad for the price.