Will not crush, slide underneath doors or leave marks on floors or carpeting Designed to hold extra-large, heavy doors with clearances up to 2" from the floor and doors with spring closures. Ideal doorstop for commercial, industrial or other heavy door usage. Made of impact-resistant rubberized material that grips tightly and stays in place even on rough or uneven floor surfaces. Highly visible fluorescent color helps prevent tripping in small spaces and doorways.