Whiteboard Marker Pen Edge Holder

My whiteboard pens were all too heavy for the weak magnets I had. So it was either to design a holder for a stronger magnet or to go a simpler route and just let the pen hold onto the edge of the whiteboard. Works perfectly!

The holder is attached to the marker by friction so it's easy to replace the marker at any time.

I've made a version with belt clip as well: http://www.thingiverse.com/thing:1323181