1. Make any stone shine, polish everyday stones into dazzling nazz gems, easy to handle and designed to be , this electric scrub allows you to transform rough stones into fine gems, fun and easy. 2. The advanced grinder is manufactured with long-lasting motor. Leak-proof rubber barrel reduces noise, makes it 75% quieter than other plastic models. Beautiful crafts for children. During operation, children can experience the joy of work and enjoy successful results, which can develop their curiosity and observation. 3. Our high-quality rock tumbler is made of high-quality electric motor, which can be used continuously and can work continuously for a long time. The leak-proof rubber barrel with grinder also has good sealing and is quieter than others 4. Our electric gem grinder is a fun and educational gem-loving toy for all ages, both children and adults. This is absolutely the gift for Christmas, Children's Day. 5. You can get a complete rock glass kit that includes all the tools you need to polish a stone: rock glass, a pound of gemstones (9 different types), four polishing grits, a jewelry repair, a tube of glue and a detailed full-color study guide, Manufacturer: MMHHHG