The PRO SERIES tumbler is the most advanced hobby tumbler ever created. Easy to use and designed for beginners, kids can create brilliant, smooth gemstones for making handmade jewelry or displaying in their collection. It's a hobby that the whole family will enjoy! Includes 3 kits:The Pro Series Tumbler kit, featuring the rock-polishing tumbler with an upgraded motor for years of enjoyment, a 2-lb capacity leak-proof rubber barrel to reduce noise, a speed control system for faster and better polishing results and a shutoff timer to save electricity. Also includes an assortment of ready-to-polish rocks, 4 grades of polishing abrasives, jewelry settings and complete instructions.The Rock Tumbler Refill Pack: Jasper Mix, which includes 2 pounds of assorted jasper in all different colors, replacement polishing grits and additional jewelry fastenings.The Rock Tumbler Refill Pack: Gemstone Mix, which includes 2 pounds of assorted gemstones in all different colors, replacement polishing grits and additional jewelry fastenings.- An easy-to-use, heavy-duty rock tumbler that is designed for beginners- Comes with assortments of ready-to-polish rocks, plus 2 refill packs of gem and jasper stones- Upgraded motor lasts for years- A fun hobby for boys and girls who love rocks!