This simple, yet super strong, aluminum back plate really improves the flimsy "plate alone" look when mounting license plates onto most taillight set-ups. Back plate is made from sturdy 1/8" thick 6061-T6 aluminum sheet stock. Hardware note: This part does not come with any mounting hardware because it can fit on just about any license plate bracket. The license plate back plate requires a 1/4", #10 or 6 mm button head screw. To get the correct length of the screw measure the overall depth of the back plate and license plate bracket.