WoodlandPRO saw chain is arguably the best value in chainsaw chain available today. We buy WoodlandPRO saw chain in huge quantities, directly from the world's largest saw chain manufacturers, and pass the cost savings on to you. 20NK is a high performance narrow kerf saw chain specifically designed for medium sized professional chainsaws. This chain makes a thinner cut than standard .325" pitch saw chain, so it requires less power from your chainsaw. Many users rave about the performance increases, especially when compared to standard saw chain. Narrow radius semi-chisel cutters have great stay sharp features, while still giving you fast cutting speeds. This chain has limited kickback reductions features, so it is recommeneded for professional use only. Sharpens with a 3/16" round file or 1/8" grinding wheel. 20NK will not perform well unless used in conjunction with a narrow kerf bar.