Micro Tungsten I Top
If you know anything about tungsten, you know it’s very dense. Almost twenty times more so than water and 1.7 times denser than lead. So it follows that while J.L. Lawson & Co’s Micro Tungsten I Top — which is made of an alloy that’s 90% tungsten— is tiny at a half inch wide, it just keeps on spinning for up to (and maybe even over) six minutes at a time on their spin tray, helped by its low friction 1/16th-inch ceramic ball tip.
Grab one at J.L. Lawson & Co – $77