Oregon 27RX is a specialty ripping chain designed to be used exclusively on portable sawmill slabbing machines, such as the Lucas and Peterson sawmills. It is built with a hyper skip chain sequence, which allows for greater chip clearance on super wide cuts. It is most commonly used to slab logs, burls and stumps. This ripping chain gives you a smooth, consistent surface when cutting parallel to the grain of a log, and because it has few cutters, it is quicker to sharpen. This chain is recommended for milling purposes only, therefore not designed for standard hand held use. Oregon 27RX ripping chain sharpens with a 7/32" round file or 3/16" grinding wheel.