An intentional EDC means being flexible and changing your setup, depending on where you're going, what you're doing and what you may encounter. A good keychain EDC should support that flexibility, and split rings--used on most keychains--are usually too cumbersome to mess with. They also make using bulkier gear, like a keychain flashlight or OPMT (one-piece multitool) nearly impossible.
The stainless steel cable keyring makes organizing and changing up your EDC much quicker, and gives those bulkier items a lot more room. Engineered to withstand more weight that you could ever load up on this 4in cable, they are the perfect length to house your keys and other critical gear.