Feature 1Handle Design, Easy to Operate: The end of the whetstone has a handle design, which is easy to operate and can be directly operated on the electric saw without accidentally hurting your fingers 2Durable and Corrosion Resistant: The product is made of good quality tool steel material, durable and corrosion resistant 3Quickly and Easily Grind: Grind any chain quickly and easily, which can make the saw chain sharper and easier to use 43/8in Applicable Chain Specification: Used for chain grinding, the applicable chain specification is 3/8in. The file specification is 5.5mm 5For Mechanical Equipment: Easy file chainsaw sharpener can be used for woodworking, garden equipment, mechanical equipmentSpecificationItem Type: Easy File Chainsaw SharpenerMaterial: Tool steelApplicable Chain Specifications: 3/8in chainFile Specification: Approx. 5.5mm / 0.2inPurpose: Used for chain grindingApplicable Scenarios: Woodworking, garden equipment, mechanical equipment Package List1 x Chain Sharpener3 x Round File1 x User ManualNoteClean up the impurities and metal shavings on the file before use, otherwise will affect the performance of the product.