Here's a view of the Gibbs Klimair unassembled. The loop for attaching a carabiner is made of steel, and mounted on a swivel. The cam is hollow, made in two halves, that are bolted together with the swivel captured inside.
In case they loosen up, the swivel bolts are prevented from popping out by the sides of the shell.
The riffraff happened to drop in on Paul Sisson while he was making up a bunch of Mar-Bars, and we took these photos. Paul seems to think it has a sweet spot.
Jacob Bergquist, of Mountain Branch Tree Service of Grants Pass, Oregon, showed up with a prototype of this device at the Western Chapter ISA TCC in Sacramento in 2003. Since then, I heard thru the grapevine that he retired and moved to Thailand to do missionary work. Are you out there Jake?