The Lifeline quick release steering boss is CNC manufactured using aircraft quality aluminium, hard anodised for strength and durability. Both male and female splines are precision gear cut incorporating a master spline for accurate alignment. The Lifeline quick release bolt-on steering boss is available in 'Group N' bolt on format and have an option of a pre-wired 8 way electrical connector to allow the use of steering wheel mounted instruments or switch gear.Bolt on fitment, no welding requiredPrecision machined splines for zero playMaster spline provides accurate and quick alignment6 x 70mm hole PCD allows fitment to most popular steering wheels and bossesThe lifeline quick release bolt on boss is designed to be bolted to a vehicle specific boss kit with a hole PCD of 6 x 70mm. It accepts steering wheels with the same PCD so can be used with popular brands such as Momo, OMP, Sparco, Sabelt, Motacorsa, Mountney M range, Simoni racing and Reverie.