Wheel Hanger Alignment Set Especially useful when replacing the brake discs. The wheel hanger alignment pins ensure that the holes in the new disc are perfectly aligned with those in the wheel hub. For stabilising brake discs, preventing brake callipers from wobbling. Includes Most common thread and pitch sizes as well as wheel stud version for hubs with wheel studs (particularly useful for 4x4 wheels). Two pieces for each size. Helpful when doing tire rotation. Set includes 2 pieces of each size - M12 x 1.25, M12 x 1.5, M12 x 1.75, M14 x 1.25, M14 x 1.5, M16 x 1.5, M12 x 1.5 (female thread).