Item Type: Needle File Set Material: Stainless Steel and Diamond Specification: Approx.3x140mm/0.1x5.5in Usage: Used for hard material processing, glass product processing, mold polishing, ceramic material processing, trimming, etc. Package List 10 x Needle File Usage Skill: When filing, it should be polished clockwise, do not rub back and forth to avoid excessive wear that affects the emery and reduce the service life. 110 Types Files: This set contains 10 different types of files, respectively are round point file, rectangle file, triangle file, half round file, flat file, oval file, double half round file, pointed flat file, knife file and willow leaf file 2Easy Usage: These needle files are very easy to use, you can choose different shapes of needle files according to different grinding needs 3120 Grit File: The needle file is 120 grit, which can help you finish the grinding work well, suitable for the processing of small parts 4High Quality Materials: The needle file is electroplated by high quality diamond, which is sturdy and durable, the rubber handle is comfortable to hold 5Wide Range of Application: This needle file set is suitable for hard material processing, post quenching material processing, glass product processing, mold polishing, deburring, edge trimming and chamfering, etc.