Original Oregon Ripping Chain. These chains feature a special factory grind for making dimensional boards and planks from larger timbers by "ripping" (cutting parallel to the wood grain). - Standard chassis and cutter parts are used. because of the aggresive cutter grind it is not recommended for hand-held use. Designed for chain-type saw mills. - LubriLinkTM tie straps help keep oil where it's needed - on the chain.