The Stihl MS 251 WOOD BOSS® chainsaw is designed to deliver all the power you'd expect from Stihl equipment, yet with a comfortable and ergonomic design. The MS 251 WOOD BOSS® is ideal for felling small trees, pruning, thinning and cutting firewood simply and efficiently. And with up to 20% fuel savings and 50% reduced emissions (as compared to previous models), you can enjoy a longer run time while feeling good about your impact on the environment. Features like a Master Control Lever™ and reduced vibration make the Stihl MS 251 WOOD BOSS® a lean, easy-to-use machine that still packs plenty of power.