[Made of High Hardness Emery for Durability]Emery is a hard, rough mineral, making the diamond sharpener a fine, natural abrasive used on metal for stripping and rust removal for removing burrs, They make sharpening an easy and efficient task. [Keep Your Chainsaw Cutting Efficiently] Sharpening your chainsaw chain with the sharpener, it takes less effort to cut through wood due to your chain will make cleaner cuts with sharp blades. [Assorted Size] Package includes 6 pieces of 5/32" (4mm)chainsaw sharpeners3 pieces of 3/16" (4.8mm) , 3 pieces of 7/32" (5.5mm). Can be used to sharpen saw chain on both gas and electric chain saws. [Sharpens Well Prolong Lifespan of the Chainsaw's Engine]Sharpens very well, a sharp chain cuts quickly and in a relatively straight line. A well-sharpened chain will prolong the life of the chainsaw's engine. [Cost Saving]You dont have to buy new chain, it will save you a lot of cost. The saw sharpening files make sharpening much easier, you can sharpen a chainsaw to like-new condition in just a few minutes. Specifications: Material: emery grain Color: gold Item: chainsaw sharpening tools Size: Assorted Size 5/32" 3/16" 7/32"