STIHL Rapid Super is an extremely fast cutting chain. It's cutter and tie strap design reduces vibration levels significantly while still utilizing the aggressive full chisel design. The razor-edged, square-cornered cutter shape ensures minimum chain friction for an exceptionally smooth and clean cut in hard or frozen wood. It offers excellent cutting and plunge-cutting efficiency. RS chain typically cuts faster than RM chain, but requires careful sharpening and maintenance to continue to perform well.