Zinc plated 40CrMo wheel studs.
70mm length knurl stud, thread length 48mm, knurl length: 12mm, total length 70mm
Good concentricity, Grade 10.9

Wheel studsare the threaded fasteners that hold on the wheels of many automobiles. They are semi-permanently mounted directly to the vehicle hub, usually through the brake drum or brake disk. Lug nuts are fastened over to the wheel stud to secure the wheel. When a wheel is removed for tire changes etc., the stud remains in the hub

Many automobiles instead use bolts to do this, where removable bolts screw into the wheel hub

Wheel studs can be either factory equipment or aftermarket add-ons