JeepinDustin wrote a review of Yakima Locking Blockhead Bike Mount w/Core on January 13, 2004
Well made, just like all Yakima products. Only complaint is the locking mechanism. It only locks the release lever. The other end of the skewer could easily be removed with some pliers. It is better than no lock, but more theft resistance would be a plus. I think If I got them again I would save the 10.00 and get non locking and a good cable and lock.