Lifeline Quick Release for Group N car application features a 6-bolt pattern on a 70PCD on both the female and male spigot sides. Compatible with Sparco, OMP, and Momo steering wheels and Hub Adapters (Boss) that share the same 70PCD. The Lifeline Quick Release Steering Boss is CNC manufactured using aircraft quality aluminium hard anodized for strength and durability. Both male and female splines are precision gear cut incorporating a master spline for accurate alignment. SFI and FIA approved. Black anodized.