Shopping List: Fridge Magnet

Making it fridge friendly. Replace mounting hole with holes to glue cylindrical neodymium magnet.

There's 3 design. You are encourage to download scad file and customize your magnet size.

1. Pen holder with exposed magnet (left handed/right handed)
2. Pen holder with hidden magnet (left handed/right handed)
3. No Pen holder (use with magnetable pen or clip http://www.thingiverse.com/thing:162588)