Dr. Cool Rock Tumbler

This hobby rock tumbling kit includes a tumbler and barrel, half pound of gemstones (9 different types), polishing grit (4 grades), jewelry fastenings, learning guide and instructions.

The metal base and high-powered motor give you a workhorse machine that will last for years. Features a noise-reducing rubber barrel with stainless steel lid that is both leak-proof and much quieter than plastic barrels. This easy-to-use tumbler has a programmable timer, giving you bigger results with less energy while never over-tumbling your rocks.