Features: *Portable simple repair file, no power or air source, suitable for outdoor logging s. *Model matching: 4.0 is suitable for electric small 3/8 chain saw grinding; 4.8 is suitable for small 325 and large 3/8 fuel saw grinding, 5.5 is suitable for large 404 fuel saw grinding. *Attention: During the grinding , please grind in direction. Repeated push and pull grinding is strictly prohibited to avoid damage to the blade edge. Specifications: *Product name: Chainsaw Round Files *Color: blue and white *Material: Tool steel(Files), Plastic(Handle) *Length: (Approx. ) 290mm *Size: 4.0mm, 4.8mm, 5.5mm *Quantity: 1pc/3pcs Package Content: 1* File or 3*Files Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data High quality assurance: Each product undergoes strict quality testing to ensure that you can provide the best quality experience. User-friendly design: The product features and appearance are carefully designed, easy to operate, and suitable for various usage scenarios. Multifunctional practicality: It has a variety of practical functions to meet your diverse needs and improve the quality of life. Environmentally friendly materials: Made of environmentally friendly and safe materials, harmless to the human body, while paying attention to environmental protection. Excellent cost performance: Provide excellent quality at a reasonable price to ensure a shopping experience that is worth the money.