STIHL Rapid Super 33RSF 3/8" .050 Ga. Saw Chain - 84 Drive Links is designed for superior cutting performance with its skip-pattern design that features an extra drive link and tie straps between each cutter. This allows for better chip discharge and higher chain speed, making it an extremely fast-cutting chain. The razor-edged, square-cornered cutter shape minimizes chain friction, resulting in an exceptionally smooth and clean cut, even in hard or frozen wood. It excellent cutting and plunge-cutting efficiency while reducing the frequency of sharpening due to fewer cutters. The RSF chain typically cuts faster than RM chain but requires careful maintenance and sharpening to maintain its performance. It is especially suited for long bars on large diameter logs but can also be used effectively on short bars. Model Number: 33RSLF 84