Grayston metric competition wheel studs, with an M12 x 1.50 thread, with a 63mm length and a 14.3mm splined section. These longer studs were devised to suit the larger spline size on many Vauxhall models, but also popular with many Japanese car owners. They are also often used on Ford's where the spline in the hubs or half shafts are worn and the studs are loose. In this case you drill or ream out the holes to suit these larger splined studs.
24mm longer than the OEM fitted Vauxhall wheel studs
High tensile hardened steel suitable for Motorsport use
Suitable for many European vehicles with a similar spline