This STIHL Rapid Super Full Skip utilizes an extra drive link and tie straps between each cutter to generate better chip discharge and higher chain speed. It's a fast-cutting chain, and it features a razor-edged, square-cornered cutter shape to deliver an exceptionally smooth cut. It's especially suited for long bars on large diameter logs, but it can be used on short bars, too. | STIHL 25" Saw Chain 3/8" 33 RSF 84