This hanger fits many types of bookshelves. My purpose of this thing is to hang a calender on the side of the bookshelf. I sliced this with MakerWare.Settings for Hanger.stl: MakerWare Medium Infill: 20% Shells: 2 Layer Height: 0.2 Temperature: 230c Extrude speed: 40 mm/s Travel speed: 150 mm/sSettings for Hook.stl MakerWare Fine Infill: 20% Shells: 3 Layer Height: 0.1 Temperature: 230c Extrude speed: 20 mm/s Travel speed: 150 mm/sI had to trim the hook to fit in the hanger, but no glue seams to be needed.