Grobet Swiss Pattern File Pippin 6 Inch Cut 4 Tapered in width and thickness. Combines the cross-sections of the round file, with the crossing file, along with the edge of a knife file. For finishing the junction of two different curved surfaces and for opening slots when a "V" shape is required. Double cut on both sides. Top and bottom edge are single cut. These files are widely used as a locksmith tool for impressioning. 3/8" wide x 11/64" thick. Swiss Pattern files means a type of fine file used for precision filing of jewelry, instrument parts, and dies. It does not necessarily mean that all Swiss Pattern files are Swiss made. Used by Professionals