Especially perfect for finely grinding models and instrument parts, and dies. uxcell 7pcs Round Diaond Needles File 2 x 100 150 Grit for etal... These diamond needle files are available. For long-lasting use, please use a lubricant (such as water) when using diamond needle files. No Coatings Designed with the base substrate without any additional coatings, suitable for wide ranges of applications. When filing, it should be ground in the same direction, not rubbing back and forth. Electroplated diamond has fine grains, high hardness and good wear resistance (hardness: 62-67 HRC). Non-slip Handle PVC plastic dipped handle provides firm and comfortable grip in use when exposed to fluid or moisture. Tips Do not use a needle file to polish the oxide layer of the work piece. Works on small and delicate projects. The file teeth are clear, sharp and durable. Information Flat files, half round files, triangle files, round files, square files, flat point files, double half round files, oval files, flat triangle files, cutter point files. Beebeecraft 50Pcs/Box 24K Gold Plated Stainless Steel French Leverback Earring Hooks 15.5x10x1.5mm Interchangeable Dangle Ear Wire Findings for Jewelry Making Non-slip plastic dipped Handle for easy and comfortable grip 2-mm Grey Diamond Sticks, Grey Diamond Needles, Grey Natural Diamond Mini diamond file for fine detail work. Diamond UXCELL Red Plastic Handle Rock Diamond 5mm X 180mm Round Files - Ali Needle File