Originally Posted by thumpism

Exactly. That's the CPSC (Consumer Product Safety Commission) at work. The Schwinn clips, lawyer nubs, fork tips with recesses, the Ross safety fork tip and many other versions; all designed to keep the wheel in place when the QR skewer on a particular bike is incorrectly "closed" simply by screwing it down with the lever in the open position. Spend an hour any heavily-biked area and see how many you can spot. You might be surprised.