These carbon steel files are designed to efficiently remove burrs, resulting in a smooth finish. They are compatible with a wide range of materials including brass, copper, aluminum, Alkeme, pewter, silver, gold, steel, plastic, and wood. Packaged conveniently in a storage case, they also come with an angled file block for added convenience.Contents:Flat needle fileSquare needle fileHalf round needle fileThree square needle fileRound needle fileAngled file block (prevents sliding, protects work surface)Storage case