Croydex - Worcester Flexi-Fix Robe Hook

"Easy to fix and sturdy, though slightly more difficult to glue onto a wooden door than onto tiles, presumably because all wood warps a bit over time."

Expensive but when you see all the bits that come with it to offer a lot of fixing options you can see why. But its a waste as you only use one option and throw the rest away. I opted to use the screws but could not get them to go through my door.