Porsche Motorsports engineering style steering wheel quick disconnect. This hub has a tapered a-semicircle socket that eliminates the frustration of steering wheel alignment found with most other manufacturer’s designs. Its spring loaded roll pin design allows for a seamless one hand removal, which is vital in any emergency situation. All critical components are precision machined from 7075 aircraft grade aluminum, anodized, and are designed to work with the standard 6 bolt pattern found on most Momo, OMP, and Sparco wheels. Hub adaptor required.