This is a great little set of exceptionally crafted diamond needle files. They are designed for detail work on a wide range of materials. Each file is 5 1/2 inches long, made from high carbon steel, and has an insulated handle. File shapes include; Barrette, Equaling, Flat, Marking, Joint, Knife, Half-round, Round, Square, and Crossing . The set comes in a flexible plastic holding case with individual pockets for each file.