The Otis AD1080316BLU is an all-purpose brush equipped with blue nylon bristles. Its double-ended design aids in delivering versatile cleaning. The larger end can be used for scrubbing large surfaces, while the smaller end is perfect for precision cleaning.This brush is proficient in removing fresh carbon or powder residue without leaving any scratches on your firearm finish. It is suitable for everyday use and can be employed on virtually every type of surface, including wood. The quality and effectiveness of the blue nylon bristle brush meet Military Specifications, ensuring exceptional overall performance.