Features: Chains can be sharpened with a chain saw file or replaced as needed. 14 teeth design provides a smooth "finished" surface which is great for minimal sanding afterwards. Great for curved work, like the inside of bowls, for fast waste removal. Please read and follow all power tool instruction to prevent injury. Specifications: Name:Grinder Chain Disc Balance: +/- .003" tolerance Material:Steel Color: Silver, black SizeCenter hole size: 22mm(7/8") Diameter: 125mm(5") Maximum speed (rpm): 14000 Package includes: 1 x Grinder Chain Disc Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you.