OREGON 21LPX056G 56 Drive Link Super 20 Chain, 0.325-Inch Recommended saw size: 38 to 62cc, bar length: 11-20-inch (28-50cm) 20lpx: .325" pitch, .050" gauge; 21lpx: .325" pitch, .058" gauge; 22lpx: .325" pitch, .063" gauge 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 20, 21, and 22lgx super 70 chains may be capable of kickback that could result in serious injury to the saw operator or bystanders