... and spline sprockets for chain saw in the world. QIRUI sprocket are made to exact tolerances and extreme quality standards ... We are the first factory of manufacturing guide bar, saw chain, and sprocket in China. The product line ... rim, wrench, chain breaker, rivet spinner, and saw file, trimmer line and so on.7) Our main ... , SGS, ISO9001 conformity certifications. rim sprocket(chain saw sprocket)