I've got two 1988 Cannondale SR series frames with cranksets that need to be removed. There is a hex nut that sits inside the crank that secures it.
Similar to this type: https://www.youtube.com/watch?v=JrMqzIQEjN0
Only issue is that none of my standard nut sockets would fit in because the crankset's body is bulky. Suggestions?