Features:* Portable simple repair file, no power or air source, suitable for outdoor logging operations.* Model Fit: 4.0 suitable for electric grinding of small 3/8 chainsaws; 4.8 is suitable for grinding small 325 and large 3/8 fuel balls, 5.5 is suitable for grinding large 404 fuel balls.* Note: When grinding, please grind in one direction. Repeated push and pull grinding is strictly prohibited to avoid damage to the edge of the blade. Specifications:Product Name: Round Chainsaw FilesMaterial: Tool Steel(Files), Plastic(Handle)Color: Orange, BlackLength: (Approx.) 290mmOptional Diameter: 4.0mm, 4.8mm, 5.5mmSuitable for: Chainsaw GrindingQuantity: 1PcPackage Contents:1 x Round Chainsaw FilesNote:1. Transition: 1cm=10mm=0.39 inch.2. The actual colors 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.