Specification：OD:24mm,ID:18.2mm,Overtall:78mm(3″),Socket Drive:1/2″. For 10 Spline lug nut and bolt. Working with most M14,9/16″-18 thread size spline drive lug nuts. Performance:The socket with thin-walled design is more safer while you are installing the lug nuts and all of our products past 72 hours salt spray tested which can promise a longer service life compared to 48 hours for others.