Turn rough stones into polished gems! The Rock Tumbler Pro features an upgraded motor for years of enjoyment, a 2 lb. capacity leak-proof rubber barrel to reduce noise, a speed control system for faster polishing times and better polishing results, a shutoff timer to save electricity, assorted gemstones to polish, four types of polishing grit, jewelry fastenings, and tumbling instructions. Use the rocks provided or any colorful rocks you find in your own backyard—and reveal the hidden beauty inside.