Recommended saw size: 50 to 100cc, bar length: 16 to 36-inch (41-91cm) * Patented chain steel-oregon ocs-01 steel is patented and provides greater durability, especially in cold cutting conditions * Blued cutters provide superior corrosion resistance and improved strength * "X" grind-Enhanced grind geometry significantly improves out-of-box sharpness with substantial speed improvement in boring and bias (undercut) modes * Warning: oregon 72, 73, and 75lgx super guard chains may be capable of kickback that could result in serious injury to the saw operator or bystanders