Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:1695073.

This was inspired by user schlotzz Fridge Magnet On/Off Switch. I designed mine in Tinkercad and made slots to insert a HarborFreight magnet. This didn't require any glue as the magnet fits tight in the slot.

It works well to hold things to the fridge. The Magnet used is here: http://bit.ly/1ID1nNo

I printed it on my MP Select Mini but its so small it can fit on any 3D printer. No supports required.