What the Multi-Clamp is being used for is an exercise known as the Extreme Uli. It is a girth enhancing technique that was developed by Bib utilizing and modifying an earlier idea developed by a guy named Uli (if any of that history is wrong, people feel free to correct).
The Extreme Uli is a rather passive technique that relies on the control of internal pressure and blood flow to stretch the tunica. Over a period of time and with a consistent routine the tunica is permanently stretched laterally or “wider” - in essence, you develop a thicker unit.
Bib developed a device known as Bib’s Uli Thing that can be used to execute Extreme Uli’s. The Camco Multi Clamp is something Ike discovered and is probably the best over-the-counter tool available to simulate what Bib’s Uli Thing is capable of.
To answer your question, the CableClamp is a valuable tool for working girth but is limited for use in Extreme Uli’s.
For a clear explanation of Extreme Ulis, what they are, and how they are done, do a search. A thread entitled “Bib’s History” goes into it, as do a few others floating about.
Also, it gets tiring to hear but X-Uli’s are not to be attempted until you have thoroughly conditioned your unit for the kind of intensity they offer.