Product DescriptionOregon is the world leader in chainsaw guidebars. It brands bars for many major chainsaw manufacturers & sells Oregonbrand in the replacement market worldwide. Oregon chains are used as original equipment by 90% of the worlds chainsaw manufacturers & by most of the worlds professional Loggers, farmers, & homeowners. Oregon also produces replacement mower blades, belts, & several other aftermarket replacement parts for power equipment.From the ManufacturerOregon cutting chain is used as original equipment by 90 percent of the worlds chainsaw manufacturers and by most of the worlds professional loggers, farmers, and homeowners. Why? Because they want their saws to deliver unparalleled cutting performance and the highest possible level of product satisfaction. Heres what Oregon provides users: Advanced manufacturing materials, innovative product features, and extraordinary quality that maximizes the high value built into chainsaws, Cutting chain that is trouble freethat cuts every type of timber, stands up in any kind of weather, and stays together in all cutting conditions, Cutting chain that stays sharper longer than most saw users ever expect, but is easy to resharpen when the time comes, Cutting chain thats made in many types and sizes to match the power of most saws, and the kinds of use for which each saw is designed, Cutting chain that has lubrication, sharpening, lowvibration, and lowkickback safety features built right in, and Cutting chain thats available for replacement anywhere in the world to ensure the highest possible level of customer service and support. Since the development of the first chipper chain more than half a century ago Oregon has been, and remains, at the forefront of chainsaw cuttingsystems technology and continues to produce the most advanced line of cutting chain available today. Oregon sharpening stones are for use with Granberg grinders