While those are doubtless great, you can just get the allen ones. Most thieves probably aren't carrying allen keys around with them, as far as I know. Plus they are a significant upgrade over the quick releases, though I would prefer no skewer at all. 9 bucks:



Though for 20 you can go to security type:



Whether the additional security of having that type of bolt is worth the additional risk of ending up locked out of your hub, is something I would have to consider.