Oregon 91PXL is part of the ControlCut product line of professional chainsaw chains. 91PXL is a high performance, low kickback chain designed for professional arborists and landscaping contractors who use powerful lightweight chainsaws, but still require an ANSI approved, low kickback sawchain. 91PXL has an advanced grind geometry, making it extremely fast cutting, right out of the box. Each cutter is blued for superior corrosion resistance and the overall length of the cutter is 33% longer than 91PX, so you get many more sharpenings. Like most Oregon chainsaw chain this style has the LubriTec oiling system to help keep both the bar and chain well lubricated. Sharpens with 5/32" file or 1/8" grinding wheel.