The Greenworks GWGD40CS30 chainsaw offers ease of use while delivering the highest cutting performance, thanks to its robust 12 inch steel bar and chain with tool less chain tensioning. This model also features an automatic oiler that applies oil to bar and chain when needed, to ensure durability and optimal use at all times. This makes it a capable and reliable chainsaw ideal for cutting wood and trees. Bare unit, use with your existing 40V Greenworks battery & charger