With the inlaid adapter ring installed, magnetic filters will sit closer to the lens to help prevent vignetting since you will no longer have the extra thickness of a traditional adapter ring, and a traditional snap on lens cap can still be used on the lens.
The inlaid adapter ring can also be installed within the threads of a traditional screw-in filter and allow for Kase magnetic filters to be stacked with the screw-in filter.
The inlaid adapter ring includes a wrench that can be used to tighten and loosen the inlaid ring.