The Nicholson maintenance file set is an assortment of 9 files in a variety of shapes and coarseness grades that have American pattern teeth for non-precision material removal in a range of home or shop uses. Each file includes a tang that can be used with optional handles for secure gripping (sold separately) except combination rasp/file, which is double ended. The set comes in a vinyl pouch for storage.Hand files are used to remove material and smooth and shape workpieces. They have forward-facing cutting teeth and cut when pushed over either a stationary or rotating workpiece. Single-cut teeth are single rows cut diagonally across the width of the file. Double-cut teeth have two sets of rows cut in opposite directions. American pattern files have three coarseness grades. Coarse, also known as bastard cut, is suitable for efficient, heavy material removal where finish is not a concern. Medium, also known as second cut, offers average material removal and finish quality. Fine, also known as smooth cut, provides the smoothest finish. Swiss pattern files have eight coarseness grades, from 00 (coarse), 0 (medium), and 1 to 6 (fine to finest), offering a smoother finish than equivalent American pattern files. For Swiss pattern files the length of the tool is the length of the blade, not counting the tang, which is the pointed end fitted for a handle; for American pattern files the length of the tool is its entire length, including the tang.Nicholson manufactures hand tools and power tool accessories. The company is headquartered in Sparks, MD.What"s in the Box? Rectangular (flat) file, 10"/250 mm, coarse (bastard) grade Rectangular (flat) file, 10"/250 mm, smooth grade Half-round file, 10"/250 mm, coarse (bastard) grade Rectangular (mill) file, 10"/250 mm, coarse (bastard) grade Round file, 10"/250 mm, coarse (bastard) grade Rectangular (flat) file, 8"/200 mm, smooth grade Half-round file, 8"/200 mm, coarse (bastard) grade Double-ended (4-in-hand) combination rasp/file, 8"/200 mm Slim taper file, 6"/150 mm, coarse (bastard) grade Vinyl storage pouch