STIHL® MS 251 WOOD BOSS® Chainsaw 18 Inch with Bar and ChainThe MS 251 WOOD BOSS chainsaw is designed to deliver all the power youd expect from STIHL equipment with a comfortable and ergonomic design. The MS 251 WOOD BOSS is perfect for felling small trees, pruning and thinning, and cutting firewood simply and efficiently. With up to a 20 percent increase in fuel savings and a 50 percent reduction in exhaust emissionswhen compared to previous modelsyou can enjoy a longer run time while feeling good about your