This is a Tamiya JR Mini 4WD Oil Applicator. This handy applicator is perfect for use with your Mini 4WD machine! Use the specifically-designed brush tip to utilize the PAO synthetic oil contained inside. This tool can be used to apply Mini 4WD F Fluoropolymer Compound Grease (Item 15383) in precision to gears and other rotating parts. It can also be used to apply oil directly as a lubricant, or even to clean parts of old grease, dust and so on.