The CTA Tools Porsche Center Lock Nut Socket, No. 5016, is designed to remove and install center-lock wheel nuts on Porsche 911 Carerra 997 and 991 performance models. This tool requires a torque wrench or torque multiplier tool for proper use. Features a 3/4" square drive and maximum torque spec of 500 ft-lbs. Not for use with impact tools.