This is Husqvarna's Narrow kerf sprocketnose chainsaw bar. Narrow kerf (also known as "Pixel") chainsaw bars are designed to be used in conjuncture with narrow kerf saw chain. These bars are slightly thinner than standard chainsaw bars to match the chain kerf. It takes less power from the saw to make the same length of cut with a narrow kerf bar/chain cutting system than with a standard bar and chain. Bars are made from high quality steel material for strength, durability, and resistance to wear.