Brightener is a water-soluble polishing agent that does not contain any sulfur, phosphorus, or chlorine additives. It offers excellent degreasing, rust prevention, cleaning, and brightening properties, and can restore metal products to a luster surpassing their original state. This product is stable in performance and environmentally friendly. **Usage Instructions:** Suitable for metal products such as lead-tin alloys, zinc alloys, and items including ratchet wrenches, open-end wrenches, screwdriver bits, socket wrenches, hex wrenches, and screwdrivers. After grinding, use the brightener in conjunction with vibration grinding and polishing machines or barrel-type grinding and polishing machines for finishing. 1. **Dosage:** Adjust according to the size of the product, the capacity of the polishing machine, and the desired brightness level (varies by company requirements). 2. **Polishing Time:** Determine based on the condition of the product. 3. **Post-Polishing:** Rinse once with clean water and dry.