Grobet Swiss Pattern Needle File 7-3/4 Inch Equalling Cut 4 Precision files, for exacting work, especially under magnification. Made of the highest quality steel, machined and finished for precision shape, accuracy and balance. 1/4" wide x 3/32" thick. Cut portions are 4" files are 1-3/4", 5-1/2" files have a 2-1/2" cut portion, 6-1/4" has a 3" cut portion and 7-3/4" has a 4-1/8" cut portion. 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