The ECHO CS-4310SX is a professional grade, mid-sized chain saw suitable for a wide range of applications, including felling. With an extremely light weight and durable frame and a powerful 42.9 cc 2 stroke engine it provides the best power to weight ratio in its class. This means you get extreme manoeuvrability and comfort without compromising on power. The industry leading, centrifugal separation dust free system is a scaled down version of the filtration system found in the CS-7310SX. This system uses centrifugal forces and an automotive style filter to ensure your engine and internal components stay free from dust and debris, reducing the need for maintenance.