The spherical door stop 3187 by Inofix is a metal, cylindrical door stop weighing 1 kg, with a durable shock-absorbing ring (O-ring) to smooth out the impact. It is a heavy door stop with dual functionality. Placed on the floor behind the door, it absorbs the impact protecting the wall, while in front of the door it also functions as a holding stop. No screwing or gluing is needed, as it works by its own weight.