Looped Square (Command Key) Desk Puzzle

This is a simple desk puzzle of a [endless knot](https://en.wikipedia.org/wiki/Endless_knot) or [looped square](https://wikipedia.org/wiki/Looped_square). I originally made it as a gift for my co-workers.

You'll need to print 4 of the pieces to make a full loop.

Settings I used in Slic3r:
Layer height: .2mm
Solid layers: 3
Infill: 20%
With a 5mm brim

Temperature: 215 for extruder and 50 for headed bed (with glass)
Printed using Meltink PLA.

I used TinkerCad to design this thing