So the Fenix E12 does not come with a clip. I decided that i wanted a holster for it so i have ready access instead of it being in my pocket. The holster has some retention. Should be enough to keep it in place, but not too dificult to remove. I printed in in black with Colorfabb XT. I printed with no support how the part file is oriented. I do not know if ABS or PLA will allow the belt clip to flex enough to slip it on. I've been wearing my first one for over a week and it has been holding up well. Edit 17 April 2015: i killed the retention tab on one of my holders. I just uploaded a version that uses an oring for retention. I have no idea if it is sized correctly to retain the light, but i think it should work. I haven't printed it yet, but am planning on printing it this coming week.