Conical seat style 12mm x 1.50 threads lug bolts. The shank length is 23mm and the total length is 56mm. The hex size is 17mm. These lug bolts fit many BMW, Volkswagen, Audi applications. Grade 10.9 with enhanced torque tension. Please refer the following drawing for exact specification and size. Visit our application guide page for any application related information. Contact us for any questions. Price is for each piece.