I made it as an alternative to those big bulky metal adjustable mounts that can't be hidden. With this u have only two small teeth on a bumper when u disconnect your register plate. Use 4mm screw diameter to fix it to plate holder. There are 4 different angles. 0 15 30 45 On the photo u see the 45 fixed to a bumper. U want straight u go 0 etc. remember to print a pair and mount it symmetrically

Hope u'll find it handy.