This Friedrich Dick three-square (triangle) needle file is ideal for filing corners, edges, sharp angles and creases or folds; it is also useful for shaping the prongs on marquise- or pear-cut settings. The file has three flat sides of equal width that taper to a fine point, and the edges are rounded to protect adjacent structures as you file.
This file has a German cut #2; German-cut files are graded by the number of teeth, counting teeth parallel to the long axis of the file. German cuts start coarser than Swiss and go finer, offering more increments for more precise cutting. In all cut styles, the higher the number, the finer its cut.
Needle files feature a miniature profile with a shorter cutting surface (typically about half their length) and round, narrow handles. These small files are ideal for working on fine details and in small areas of the workpiece; they're ideal when access and surface finish take priority over metal removal. Though they can be used as-is, securing the file in a handle (available separately) improves control for better precision and tool safety.
Among the finest jewelers' files in the world, Friedrich Dick files are made of tough chrome/tool steel alloy and precisely machined to yield sharp corners and fine points. These files have deep-cut teeth that provide efficient, uniform stock removal; they are 66–67 HRC hardness for exceptional service with minimal care.