The stratosphere (/ËstrÃ¦tÉËsfÉªÉr, -toÊ-/) is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere. About 20% of the atmosphere's mass is contained in the stratosphere.
The chainsaw is a highly effective and efficient tree and branch cutting power tool. It works with an engine, referred to as a power head; powering a metal chain, driven by a centrifugal clutch, with a chain moving around a groove in the guide bar at fast speeds.
Power and performance. From routine tree care, to timber harvesting, to cutting firewood, Husqvarna chainsaws have always set the outdoor power equipment standard. Our gas and battery powered saws deliver the power, performance, and ergonomic design to meet the needs of demanding professionals and homeowners alike. View Husqvarna Chainsaw Models.