how to remove carriage bolts from a wooden swing set

Paul's Avatar (by Gravatar) by Paul in  Furniture 

Am trying to take apart a wooden swing set. Put together with carriage bolts and tee nuts. How do I remove the rounded bolts.... nothing to grip onto.

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Answer by

That doesn't sound possible. So, I'd say they're actually Security Bolts. Those, are only very slightly oval and require a special bit to install and remove them.
Conversely, you can grind a slot into the head for a flat-head screwdriver or you can drill a hole in the center to then drill them out with a Screw-Out reverse threaded drill bit set.

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