Features:1. Great tool for polishing jewelry, make your jewelry shine as new.2. Five knives sets in different size to meet the size requirements.3. When burnishing, you can add some water or professional oil, the effect will be better.4. The polishing of agate knife depends on the ductility of gold and silver to compact them, no abrasion to gold and silver.5. It can cleaning all kinds of dirt on gold, silver, copper jewelry.Specification: Condition: 100% Brand NewItem Type: Jewelry Polishing ToolMaterial: AgateOptional Color: Gray, RedSize: Approx. 8cm/3.2in9cm/3.5in10cm/3.9in11cm/4.3in12cm/4.7inWeight: Approx. 84gPackage List:5 * Agate KnifeNote:1. This is the fragile products, please keep carefully.2. Agate knife is a natural product, the color and weight of each product will be slightly different due to production reasons, please understand.