Magnetic door stopper
Door stoppers or holders: functions, types, installation : Magnetic Door Stopper
Quote from Article entitled Door stoppers or holders: functions, types, installation:
Floor stopper, as follows from its name, is supposed to be on the floor. It is the most popular among all the variety of door stoppers offered. The long lifetime and corrosion-resistant metals such as brass, stainless steel and copper, and rubber compactor, which protects the door leaf from damage, are usually used for production of the floor stoppers.
The full version of the article can be found here.