This is a simple hook for over the top of an internal door. It's proven to be a very popular item round the house, with multiple hooks on some doors!The design is derived from a headphone hanger which has a neat curve on the flat of the hook, adding significant strength. I've made the off-side quite narrow so a door can close, even with the hook fitted, presenting the hook within the room.It's very strong and looks well when printed in white ABS, with a layer height of .25mm, but I'm sure it will work in PLA, sliced as you prefer.".stls" included for a variety of Internal door thincknesses. I've also included a Sketchup file which has a variety of widths (15mm, 18mm for wardrobes and drawers, 35mm, 40mm, 45mm for doors and 60mm for work cubicals).Slice as desired, depending on the finish you want, and print in a plastic of your choice. A small brim (Slic3r feature) will help keep it on the bed as it prints. The nature of it's tall narrow shape can mean it will try pop off the bed, if not well attached while printing.Clip the hook over any door and enjoy the benefit of some extra hooks around the house. (Some doors will close, even with the hook fitted, if there is sufficient gap around the frame.)