On 23 Apr 2007 14:14:48 -0700, wizof103 wrote:

I am trying to change the blades on my lawnmower. I have one of the
two bolts loosened but the other will not budge. I have tried WD 40
and silicone spray. I have used a ratchet set, a power crip pliers,
nothing seems to work, any tricks to remove this nasty thing. Thanks
in advance.

Purchase an impact driver

http://en.wikipedia.org/wiki/Impact_driver