Step 1: Tools and Materials
*A rod or other suitably shaped piece of ferrous material
*A cotton ball
*Dremel w/ cut off wheel (or other implemtns of metal cutting and shaping)
*Bench vise or other way to hold your work piece.
Step 2: Choose and Cut Your Metal
I then used my dremel to cut most of the way through the rod about 3/4 of an inch from the tip. I cut from both sides leaving a thin piece of metal connecting the end to the rest of the rod. Then I used a pair of pliers to break the end off the rod. (I've found that if I cut all the way through the rod the piece I want goes flying across the room. You then spend more time looking for the piece than it actually takes to do the project. Or you're trying to call 911 with a piece of metal in your eye.)
Step 3: Clean Up the Rough End
You can use a pair of pliers to hold the piece, however I took advantage of the anatomy of my work piece to control it. I screwed a threaded rod into the hole on my work piece. This gave me a handle to manipulate the piece and keep my hands from getting burned as the metal heated from friction.
Step 4: Mounting
Once you've selected your spot put some isopropyl alcohol on the cotton ball and clean the area (I have to thank Zach for this tip in his Garmin Nuvi Mount instructable). Once the residual alcohol has evaporated, put super glue (If you want to be able to remove it w/o damaging the surface choose something else to secure it) on the bottom of the holder. Put the holder in the proper orientation and place it in the spot you've cleaned. If the holder is likely to fall before the glue dries hold it in place or rig a jig of some sort to hold it in place.
Once the glue has set up apply sunglasses.