This product is chainsaw chain small file, there are 12 pieces of small files. [High quality material] Forged with high quality diamond, high temperature quenching, high hardness, not easy to deformation, wear resistance. [Diamond particles] The surface particles are even and full, wear-resistant, good overall surface finish and high cutting efficiency. [File sharp] Super grinding performance and service life, made of high quality raw materials, sharp and more durable. [Various specifications] A variety of specifications to choose from, complete specifications, applicable to a wide range of flat and smooth, full of various needs. [Wide range of uses] Suitable for chainsaw chain grinding, jade glass grinding, etc. Product specification： Material: diamond Cross-sectional shape: cylindrical Outer diameter: 4mm/0.16inch Shank diameter: 3mm/0.12inch Length: 45mm/1.77inch Use: Chain polishing