Lang 4 Lug With Extension 1/2 Ton Dana 80 is made for high-shear rotating nuts on F250-350 with Dana 80 rear axle 10 1/4” ring gear; E350 with Dana 80 rear axle and 10 1/4” ring gear; F super-duty with Dana 80 rear axle and 10 1/4” ring gear. Lang 4 Lug With Extension 1/2 Ton Dana 80 is designed for use with a torque wrench when servicing truck wheel bearing lock nuts. Not to be used with pneumatic power tools.