Summary

A small hook (or post) with holes designed for 1/8in x 1/8in cylindrical magnets. Works as a refrigerator magnet or other utility.

Perhaps it works best as a magnetic "thumb tack".

Instructions

This was printed with default "standard" (medium) settings in MakerWare, but with increased fill, i.e., 0.20mm layer, 2 shells, 20% infill.

The holes are sized to house 1/8in (3.175mm) diameter cylindrical neodymium magnets (i.e. http://www.amazon.com/Neodymium-Magnets-inch-Cylinder-N48/dp/B001KUOKPA). Depending on calibration, the magnets snap in and are held well just by friction, though a tiny bit of super glue may be helpful. You may need to scale slightly to get the fit right for your magnets and printer.

As printed, it weighs <1g and takes <10min to print.

A Simple Magnetic Hook