Husqvarna H82 is fastest cutting saw chain made today. When sharpened correctly, no other chain cuts faster and smoother. This chain style is primarily used on the west coast in big softwood timber. Hand filing this chain properly is very difficult to do. Most operators will invest in a chisel grinder and bring freshly ground chains to the job. This chain works best cutting clean wood, and will dull quickly in abrasive conditions. If the sharp point on the cutter becomes dull, the chain quits cutting efficiently. H82 chain sharpens with a double bevel or 3 corner file or chisel grinder.