Competition wheel studs, with an M12 x 1.50 thread in the 63 mm length, with a 14.3mm splined section.
These longer studs were devised to suit the larger spline size on many Vauxhall, Mitsubishi, Toyota models,
They are also often used on Ford's where the spline in the hubs or halfshafts are worn and the studs are loose.
