Actually I found it funny that he commented on how big it was and made his own. At work we use 7/8" and larger all the time. A 7/8" hex key fits a 1-1/4" socket head cap screw, so that's not all that big. A 1-1/2" socket head cap screw takes a 1" hex key--very common around here. We regularly slip a 10 foot pipe over the end of them and push on that with a forklift to break big ones loose. The constant heat of the forging process really locks all the bolts in and having to drill them out is common.