ECHOs 12 in. low profile replacement chainsaw chain (90PX45CQ) is designed to fit narrow kerf bars. The unique chamfer chisel is designed for low vibration and low kickback to increase cutting efficiency and to provide additional safety to the user. By replacing your chain with a genuine ECHO replacement chainsaw chain thats been manufactured to deliver maximum performance and reliability you help to extend the life of your chainsaw bar and keep your equipment running at peak performance.