No - they're just TIGHT. I use an mpact wrench with a 6 point socket.
I don't even bother trying with standard hand tools - if you damage the bolt, it will be even harder to remove.
12V inpact wrenches can had for next to nothing on ebay. Quality isn't great, but they do the job.
phil_saunders@bigfoot.com
Phil Saunders
September 2008