The MF21 by Mr. Hobby is a state-of-the-art precision file designed for modelers who demand the best in performance and durability. Featuring advanced electrolytic polishing technology, the MF21 boasts a sharper, file-finish blade with a distinctive black color, a sign of its superior chemical polishing. This high-quality steel flat file is engineered for efficiently shaping, smoothing, and finishing plastic models, resin, and other modeling materials. Its fine teeth pattern ensures smooth filing with minimal scratching, while the comfortable handle provides controlled use and reduces hand fatigue. With its enhanced cutting ability, the MF21 quickly removes material, making it perfect for refining surfaces, removing mold lines, and adjusting part fits. Suitable for modelers of all skill levels, the MF21 delivers precise, consistent results for detailed work.