Oregon PS50 Saw Chain, Small Pitch: 3/8" Low Profile, gauge: .050", drive link count: 50 Replacement chain and sharpening stone for the portable bar-mount sharpener. LubriTec keeps your chain and guide bar oiled for less friction and longer life For saw sizes up to 42 cc This saw chain met the kickback performance requirement of ANSI B175.1-2012 when tested according to the provisions of ANSI B175.1-2012. Low-kickback saw chain meets the kickback performance requirement of CSA Standard Z62.3.