Needle Files are a intricate and small version of a file and they can come in many different ranges of profiles. However most high quality needles are very expensive, and some keep specilized Needle Files for gold to prevent cross-contamination; all of these different variables of Needle Files makes it a very versitile and extremley necessary tool to have. Swiss made. Total length 160mm, 5.1mm wide x 2.0mm thick. Cut 0 rough, to cut 4 fine.