Description is inaccurate. These are not "lock-up" nuts, they offer ZERO protection against theft, and the tool used to remove them is in no way a "security key". These nuts have 6 symmetrically arranged splines. Like every standard nut on the planet. By the way, the 17 mm deep head is perfect for her. Anyone who has a set of sockets can remove them. DO NOT rely on your wheels not being stolen. But they have a beautiful purple hue.