If you are looking for maximum casting distance and ultimate hook setting power - or bottom fishing with minimum weight and far less current drift, then Zero Impact is the line for you! Paragraph: The engineers at PowerPro have developed the first ”repeating Dual Test Line” - a long section of normal diameter line (20') tapering up to a short tie zone (3') designed to offset the 35% strength loss when tying a knot. Your spool will fill just like regular PowerPro at any given test, but works like a line 2 sizes stronger when tied in the termination zone.