High quality materials: Chainsaw chain template made of high quality diamond sand, The uniform and homogeneous distribution of the granularity of the grinding wheel heads makes polishing work child's play, Can be used for a long time . 30pcs Mill Set: When you sharpen your chainsaw chain with the sharpener, you need less effort to cut wood because your chain makes cleaner cuts with sharp blades. Makes sharpening easier: Since you don't need to remove and assemble the new chain, making sharpening much easier, you can sharpen a chainsaw in new condition by just a few minutes. Assorted Sizes: Package includes 10pcs 4mm, 10pcs 5.5mm, 10pcs 4.8mm replacement stones. Can be used to sharpen the saw chain on gasoline and electric chain saws. Widely used: The saw chain sharpener is for a variety of applications, can be used for surface decoration lines of metal, stainless steel, iron, copper, wood, plastic and other materials.