ZETA and DRC products are distributed over 50 countries now. They ride dirt bikes. They develop products for dirt bikes. They test, manufacture and supply high quality products for dirt bike riders. Designed to break, press side plates and rivet most 420, 428, 520, 525 and 530 standard and O-ring chains. Lightweight aluminum body. Straight-forward part construction. Conveniently stores headpin in the handle. Fits nicely in the tool box and no loose parts. Replacement chain cut pins available (sold separately).