Mount for hanging lamp for sloping ceiling

Do you have sloping ceiling on some of your rooms? Have you got some hanging lamps in these rooms?
If yes, then you propably wan't to have this item.

Sloping ceilings with hanging lamps doesn't look that nice. With this mount you'll get lamp hanging horizontally and so result looks muxh nicer.

Most ceiling lamp mounts have some kind of plastic box embedded inside the ceiling with two screw holes.

Just take following actions and print lamp mount for your own needs:
- measure distance b