Ryobi rcs5145b petrol chainsaw has a powerful 2 stroke 51cc powr xt full crank engine that delivers outstanding durability and performance the three point anti vibration isolation provides additional user comfort and reduced fatigue during prolonged use the chainsaw also has a fast acting inertia activated chain brake for increased safety other features include automatic chain and bar lubrication clear fuel and oil tank for easy view of fluid levels tool less air filter access and a convenient