Door stopper can be flipped-out to prevent door from entering pocket and pinching fingers Door stopper can be flipped-in to completely open the door Applicable door thickness: 30~40 mm (1-3/16"~1-9/16") Can be used on door thickness up to 50 mm (1-31/32") by using longer M4 screws. (Not supplied.)WARNING: This product can expose you to cadmium, lead, nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.