On those stripped bolts I picked up a set of I think they were called bolt out or someting at sears thier craftsman I don't usually go for "gimic" type things but I got to tell these things work they fit on your ratchet somehow they are designed so that the more pressure you put on the handle the tighter they grip and I was impressed they run about 20 bucks for a set of 5 differant sizes several diff sets I highly recamend them for stripped bolts
good luck
ProStreet