Uxcell 3mm x 140mm Flat Diamond Needle Files Hand Tool for Metal Wood Stone 4 Pack

Electroplated diamond has fine grains high hardness and good wear resistance. The file teeth are clear sharp and durable. Suitable for shaping and polishing metal wood marble stone plastic. Works on small and delicate projects. Especially perfect for finely grinding models and instrument parts and dies. PVC plastic dipped handle provides firm and comfortable grip in use when exposed to fluid or moisture. Designed with the base substrate without any additional coatings suitable for wide ranges of applications. When using the file it should not be too fast. The file usage frequency is 40 times per minute. For long-lasting use please use a lubricant (such as water) when using diamond needle files. Tips: Do not use a needle file to polish the oxide layer of the workpiece. When filing it should be ground in the same direction not rubbing back and forth.