High Quality Materials: Chainsaw chain gauge made by high quality diamond sand, The uniform and even distribution of the granularity of the grinding heads makes the polishing work a breeze, Can be used for a long time. 30pcs Grinder 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, which makes sharpening much easier, you can sharpen a chainsaw to like-new condition in just a few minutes. Assorted Sizes: The package includes 10 pieces of 4 mm, 10 pieces of 5.5 mm, 10 pieces of 4.8 mm replacement stones. Can be used to sharpen saw chain on both 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.