http://www.sears.com/craftsman-10-pc-damaged-bolt-nut-remover-set-low-profile/p-00952166000P
Last spring when I went to put the snowmobiles away the ski tie down bar cranks were seized and I had to cut them off the trailer with a sawzall, leaving me with about 2" of threaded rod sticking out of my trailer.
Getting ready for a new season of snowmobiling I decided last night it was time to deal with this mess. Hit the threaded part with the MAPP torch then blasted them with my favorite penetrating oil. First I tried vice grips but they couldn’t get enough grip on the threaded rod. Then I remembered getting that bolt extractor kit a couple years ago for Christmas. Once I found the right size it bit into the threaded rod so well I was able to use my ratchet and a 2 foot pipe to back the seized part out. I highly recommend this product.
Here’s the offending bolt with the extractor still attached: