15 Jewelers Titanium Diamond Needle Precision File. This is a new set of 15 diamond coated needle files. Great for filing glass, ceramic, rock, carbide, gold, platinum, silver or anything else that is hard. Made of tempered stainless steel. Cut quickly and smoothly since the files cut on both the push and pull strokes. These have fine grit diamond electroplated onto high grade stainless steel. You receive: One set of 10 needle files that each measure approximately 4" (102 mm) long. One set of 5 needle files that each measure approximately 7" (178 mm) long. We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.