A+ product for original build quality, tight thread fit, rim hole fit, socket fit and the ability to sink socket into rim. The head itself is just under 3/4" OD but uses a 13/16 end cap for tightening. They easily took 120 pounds of torque. The lugs have a 13/16" extension where the striking face meets the rim I can't say anything about the durability yet, but the car is outside, we'll see.