In article ,
Ken Dibble wrote:

How about $3 for piece of hardboard, a few rare earth
magnets, and a little glue?
Use a forstner bit to drill a hole a little deeper than the magnets are
thick.

That's what I made and have used for years now.
--
Owen Lowe
The Fly-by-Night Copper Company
__________

"I pledge allegiance to the flag of the
Corporate States of America and to the
Republicans for which it stands, one nation,
under debt, easily divisible, with liberty
and justice for oil."
- Wiley Miller, Non Sequitur, 1/24/05