Feature: 1. CREATE YOUR GEMS: Make any stone shining and polish everyday rocks into dazzling gems, thanks to simple operation and durable design, this rock grinder kit makes it possible to turn rough rocks into beautifully polished gems, fun and easy 2. QUIETER THAN OTHER TYPE: The quality sander is built with a durable motor that's built to last. The leakage proof rubber barrel reduces sound, making it 75% quieter than other plastic models. A great DIY activities for kids 3. COMPLETE TUMBLER KIT: Contains everything you need to make polished gems, like 4 polishing grits, real rough gems, and a detailed full color study guide. A great gift for girls and boys 4. EASE OF USE: Simple instructions and one touch settings make gems grinding fun and easy. Control the number of days per rollover cycle with a one touch timer and auto off, set and forget it 5. STABLE AND DURABLE: Rock tumbler kit come with stable structure, excellent performance and long service life How to Use: After opening the package, take out the accessories and follow the instructions. Specification: Item Type: Rock Tumbler Kit Model: HS-403 Material: ABS, metal Voltage: 100-240V Package List: 1 x Host 1 x Roller 1 x Stone Bag(random style and color)(inside the roller) 1 x Power Adapter 4 x Sanding Grits 1 x Glue 1 x Wheel Belt 1 x Accessory Bag(1 large key ring, 1 small key ring, 1 necklace, 2 ring circle, 3 stone buckles, 2 pins) 1 x User Manual