20 Diamond Coated Needle Files Handles Lapidary Tools. 10 File Handles. This is a new set of 10 black file handles. Accepts broken saw blades for wax filing. Use as a hand drill with small twist drill bits. Use as a screwdriver with small screwdriver blades. Each measures approximately 5 (127 mm) long. 10 Diamond Coated Needle Files. This is a new set of 10 assorted diamond coated needle files. Great for filing glass, ceramic, rock, carbide, gold, platinum, silver or anything else that is hard. Great for cutting stone, gold and silver. 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. Each measures approximately 4 (102 mm) long. FindingKing works 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.