The Oregon 111590X Power Mate Rim Sprocket System includes a 3/8" pitch standard 7 spline (SD7) rim sprocket that can be used on all types of chain saws. This sprocket allows you to extend operational life by maximizing chain and bar groove alignment, all while reducing your overall costs. The sprocket's two-piece design includes a drum with replaceable rim, allowing the rim to be change multiple times before the entire unit is replacement. This sprocket should be replaced every rims.

• For best performance, replace every three rims
• Extend operational life by maximizing chain and bar groove alignment

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov