Steel Diamond Files, Graining Burnishing Tools, Raw(Unplated)Size: about 5~9mm wide, 180~184mm long; 10pcs/set.â Various Styles: Include Triangular, round, half round, barrette, crossing, knife, equaling, warding, three square, satisfying your diverse needs in different occasions. â Wide Application: These steel files are a must for detailed and intricate work, such as filing, deflashing, smoothing and shaping, etc. â Tips: These needle files are supposed not to be get damp to prevent being rusty.