[CERTIFIED NON-TOXIC MATERIALS SAFE FOR CHILDREN AND PETS] EN 71, FDA, and RoHS certification makes this rubber door stop perfect for homes or offices with children or pets. You don't have to worry about harmful odors or toxic chemicals. [NEVER LOSE THE DOOR STOP WITH THE INCLUDED HOLDER] Each rubber door stop comes with a very practical holder. Simply attach the holder to any door or wall, it keeps the door stop ready to use whenever you need it. [SUITABLE FOR ALL DOORS AND FLOORS] Use the rubber door stop with confidence to prevent it from slamming shut at the slightest draft, regardless of the surface. The door stop effectively keeps all doors open on linoleum, tile, stone, wood, carpet, cement, asphalt, and more. It is also possible to double the height by stacking the door stops for higher thresholds. [USE ANYWHERE] It is suitable for all doors and floors. It has good grip on tile, carpet, laminate flooring, wooden doors, metal doors, glass doors, self-closing doors, heavy doors.