The Wheels MFG Centerlock Socket is designed to create a tight grip on a standard 44mm Centerlock Rotor Lockring to avoid slipping while torquing lockrings onto Centerlock Hubs. Designed to be used with a 3/8" drive socket or torque wrench for easy installation and removal. The socket can also be used with 3/8" ACME threaded press rods and adjustable press stop mini to prevent slipping. (Not Included).Precision machined 6061 aluminumAnodized red3/8" drive interface