The Motacorsa quick release steering wheel boss is an aircraft quality aluminium CNC manufactured construction which is hard anodised for strength and durability. The male and female splines are precision gear cut incorporating a master spline. The master spline allows you to accurately align the wheel when in position.Brings the steering wheel 50mm closer to the driverHard anodised black finishEnsures a quick and easy removal of the steering wheelBolt to Boss. Group N - (allows you to use the quick release mechanism in conjunction with any aftermarket steering wheel boss that has a 6 x 70mm PCD steering wheel fitment e.g. Sparco, Momo, OMP)