Swiss Pattern Files are designed for detail work, delicate finishing and precise metal removal. Grobet files are made of the finest heat-tempered, chrome alloy steel. Pillar Checkering files are parallel in width and gently tapered in thickness. Overcut is parallel to file edges and upcut is 90 degrees to overcut. Useful for putting serrations on knife edges and to obtain a checkered design. Double cut top and bottom - Both edges are safe. Length: 6 inches. Cut: 00. Width: 13.0mm. Thickness: 4.0mm.