Yakamoz 10-Piece Mini Diamond Needle File Set Metal Riffler Files Jewelers File Precision Hand Tools for Glass Wood Stone Jewelry Feature: Diamond needle file that is sharp, high strength, good physical properties and wear resistance. No rust material with very comfortable soft vinyl handles for continuous use. File base is made of Bearing Steel with Diamond Coated file tips for long lasting durability. Great for Glass, Ceramic, Metal, and Hard Wood or Jewelry Carving. Widely used in a variety of molds, models, parts, handicrafts and other industries. Specifications: File Surface Condition: Diamond Coated Body Material: Nickel Plated Alloy Steel Hand Grip Material: Rubber Total Length: 5-1/2" (140mm) Diamond-Coated Length: 2" (50mm) Diamond Grit: 150 Handle Shank Diameter: 1/8" (3mm) Shapes of Files: Round, Square, Equilateral Triangle, Leaf, Triangle, Oval, Half-Round, Flat, Knife, Sharp-Flat Package Included: 10Pcs Mini Diamond File Set