It does sounds like the Swench is what he might have been describing. They're still available new from Power Hawk Technologies, and I just saw one on eBay for $150.
Might be a handy field tool where now electric power or compressed air is available. I've had a few bolts that were too rusted to get loose with an impact wrench and needed the blue-tip wrench. Might have defeated one of the smaller Swench wrenches (rated at 500 ft-lb), too.

Last edited by klhansen; 11/13/2018 10:48 PM.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.