Description Description The Haskel 17937-1 8 inch piston rod is a separate piece that is connected to a crosshead. The piston rod allows power to be transmitted from a controlled explosion in the cylinder to the crankshaft, and to the push rods and lifters. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Literature & Docs Accessories