This is a dispenser for plastic razor blades. (linked below)
The file includes the dispenser meant to be mounted using double stick tape to wherever you want it, and a tool to assist in the loading of it. See images above.
EDIT:
Added file with countersank screw holes also if anyone prefers not to use double stick tape.
I also added a file for a lid that just sits on top, not tight for both designs.
Link to blades: