Grobet Swiss Pattern Halfround Ring/Slim File 6 Inch Cut 2 Tapered in width and thickness, coming to a point. Narrower than regular half-round and, therefore, useful fo filing inside of rings. Double cut on both sides. 15/32" wide x 9/64" 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