U Joint 1/4" Drive Coaxial rotation axis delivers smoother universal joint movement vs conventional universal joints.. Strength was increased by shifting the drive angle by 45º allowing it have a thinner body.. The nepros universal joint with spring force provides smooth access to bolts.. Designed for maximum strength with minimal wall thickness made possible by tough materials, advanced processing technology, and optimal heat treatement.. Optimal fasstener fit- Nepros industry leading tollerences reduces the fit gap with bolts and nuts to the absolute minimum, creating a superior fit feeling.. Exceptional surface finish- Proprietary hard chrome plating for anti-wear, anti-corrosion, and superior appearance. NBJ2