Product Description: Quantity: 4pcs(1 piece of chain sharpener yellow + 3 pieces of grinding stone accessories (replaceable)) Color: yellow Material: Made of high-quality ABS plastic, this light and durable chain saw blade is suitable for most chains on the market . Easy to install and use: The chain saw abrasive tool is installedin the abrasive tool, which can be installed and used at any time, so that your chain can be sharpened in a short time. Keep lubricating oil on the chains and tracks to reduce friction and extend service life. Perfect design: In order to adapt to differenttypes of hole chains, the chain saw sharpener is designed with two holes for fixed sharpening, one hole is fixed, and the other hole moves back and forth, which is very flexible. Check in advance that your electric saw blade has two holes.