DOP75CK025U 3/8"-Pitch Super Guard Chain 25 Ft. Roll .050" Gauge - New advanced grind geometry significantly improves out-of-box sharpness, substantial speed improvement in boring and bias (undercut) modes. Blued cutters provide superior corrosion resistance; tumbled parts, improved joint articulation, reduces friction & stretch, offset ramp-shaped depth gauges reduce roughness, clean ground gullets, increase chip flow & evacuation, Vibe-Ban chassis design reduces vibration 25% or more at chainsaw's handle, LubriLink tie straps help keep oil where it's needed - on the chain. Top-plate witness mark makes accurate sharpening easier. Square-ground cutter,semi-skip sequence. Made of patented steel, with greater durability, especially in cold conditions.