1. Diamond file is perfect for detail work.It allows precise filing in hard to reach areas on metal, wood, plastic, etc.2. The files are coated with industrial diamonds to create the hardest abrasive surface available. 3. The hardest abrasive surface - effectively file and shape steel, glass, tile, stone, metal, etc.4. Nonslip plastic dipped Handle for easy and comfortable grip.5. These needle files can satisfy your different needs. 6. These popular precision files are indispensable mechanic tool for mechanics, electronics repair, woodworking and other applications.Specifications:Product Name: Diamond FileMaterial: Diamond, Alloy, PlasticFile Type: FlatTotal Length: 100mm / 4-inch; Diamond-plated Length: 40mm / 1.6-inchDiamond File Width: 4.3mm / 0.17-inchShank Size: 2mm / 0.