Key Holder

It is the first project that I upload, so forgive me if there are some errors.
I designed it with Inventor and printed with my Anet A8. The height is 24cm, so in order to cut the time of printing and avoid to have something very high, I divided it in two halves which then were glued with a very strong glue. For making the printing easier, it is suggested to rotate the features so that the ring is the base in both halves. Total time for printing (layer height 0.17mm, shell 1.2 mm, 20% fill) more or less 8h.
The scale factor is 100x: I mean that when designed with inventor the unit of measure were in mm. When I open it with CURA, it is smaller of a factor 100x. See picture for dimension informations.