Bone style coat / leash hook. 

I originally had the dog names on the model, but removed it for this file. If i figure out how to make a modifier I will repost up

I printed with some extra perimeters and printed flat side down, may be better ways to orientate. Screws are #8 x 1 ¾" which are common used in wall anchors. I like to recommend E-Z Anchor (25310) which are super easy to use.