Material: The chainsaw chain file is made of bearing steel, with high hardness and strong wear resistance. After a meticulous production process, it can be produced. Wear-resistant, more corrosion-resistant, durable and has a long service life. Practical tool:This round chainsaw file,Can make the chainsaw sharper, improve the working efficiency of the chainsaw and extend the life of the chainsaw,Practical tool for quick and easy teeth grinding; This round chainsaw chain sharpening file has the advantages of low noise, simple appearance and easy operation. Round file: These round chainsaw sharpening files have a round shape, a smooth cut and a straight tang. chainsaw chain file helps improve the cutting efficiency of your chainsaw; It can effectively improve the working efficiency of the chain saw and extend the life of the chain saw. Widely used: chainsaw chain file meets the needs of most people, ideal for woodworking and metalworking enthusiasts, ideal for carpenters and DIY projects at home, garden. Interchangeable: 6 4.0 MM chainsaw chain sharpening files can meet most of daily chainsaw chain sharpening tools.