You are looking at the NRG Innovations Quick Release. This has been designed to allow you to quickly and easily disconnect your NRG Steering Wheel and it is compatible with all NRG Steering Wheels and short hubs.
Here are more details:
Features second generation ball-locking system to prevent scratches to the hub Self-locking feature adds increased safety and functionality. Upgraded black flared ring. Anodized black body. Made using aircraft grade aluminum materials