they still sell these, interchangeable head inserts for whatever size you need. mine is 1-7/16 and cost me $5 at an auction. I looked up the brand, they are not cheap, couple hundred for the handle and another couple for the 6pt insert. super heavy duty though.
google Lowell wrench co. there are distributors out there.
last pic, I made an insert so I can use it as a 3/4" ratchet...
https://lowellcorp.com/products/model-41-ratchet-arm-1-1-8-hex/

I also found this gearwrench pass through set in 6 point that may work out, have any of you used this one, would it hold up in an industrial environment?
I have a set in 3/8". Its a nice set that I really just don't use. In theory it's a stronger set up than a standard ratchet socket combo because the force is applied around the socket instead of threw the drive end. I would assume as long as these bolts you are going after are with in 1/2" drive torque range, you should be fine.thanks for the replies, this is an odd one in fairness.
I also found this gearwrench pass through set in 6 point that may work out, have any of you used this one, would it hold up in an industrial environment?
http://www.gearwrench.com/gearwrenc...t-standard-sae-metric-mechanics-tool-set.html
I disagree that the mechanism is be stronger. You are essentially dealing with a reversible ratcheting wrench, which are not known for being super strong. Its just a tiny little pawl ratcheting on on a fine tooth gear. From fiddling with the GW pass through set I had, in betting they are not as strong as the largest comparable ratcheting wrench compared to the largest size socket in the set.I have a set in 3/8". Its a nice set that I really just don't use. In theory it's a stronger set up than a standard ratchet socket combo because the force is applied around the socket instead of threw the drive end. I would assume as long as these bolts you are going after are with in 1/2" drive torque range, you should be fine.
if that thing has a 1-1/8" hex in it that is a monster, it looks like a 1/2". That looks like a nice tool.