Door stop is mounted to the floor, allowing the bottom of the door to contact it.
It is easy to install with the included mounting hardware.
This is one the quickest floor mounted door stops to install because the ring goes all the way around the bumper, allowing you to install it just about anywhere on the floor for door contact.
Drill one hole and it's done.
If using near a wall, you want to mount this in a position so that the bumper makes contact before the door lever hits the wall.
Thus protecting not just the door, but the wall and door lever as well.