ECHO's 10" in. low profile replacement pole saw pruner chain (91VXL39CQ) is designed for low vibration to deliver cutting efficiency and an aggressive cut. The increased top plate length offers extended sharpness of the cutters over time and decreases the amount of sharpening needed. By replacing your chain with a genuine ECHO replacement pole saw chain that's been manufactured to deliver maxium performance and reliability, you help to extend the life of your pole saw pruner bar and keep your equipment running at peak performance.