Mr. Tatume

It looks to be a fancy way to accomplish an old #1 accuracy trick. A threaded hole is put through the end of the hanger under the barrel, and a set screw is used to provide adjustable pressure to the barrel. Some folks swear by it. I gather whether it works or not depends on the particular rifle.

This device appears to fit on the end of the hanger and provide the same set screw pressure adjustment. Seems to be well thought out and may be worthwhile to try if your rifle is not shooting as well as you wish.

Glenn