The Window Regulator Crank Handle - Rounded Splined Shaft is a practical and reliable product designed to fit square shafts with a flange. Made from billet aluminum and chrome plated, it offers durability and a sleek appearance. Sold individually, this handle is compatible with Peterbilt models up to 1997, as well as Kenworth and Western Star models. Its rounded splined shaft ensures a secure and efficient operation. Upgrade your window regulator with this high-quality handle for enhanced functionality and a polished look.