There are two options for attaching to the door: door arms hanger or self-adhesive (sticky double-side tape is provided).
【Easy Opening and Closing the Door】 door arms is design for regular door ( thickness between 1.25-1.85 inch), opens and closes door smoothly.
【One Minute Assembly】Slide the hook into one end of the track, and screw the two arms into the track. (Note: The package does not include the screwdriver)