I'm not sure and have wondered the same thing. Most of the time I see Keith use either Keith Kues, or Keith Kustoms. which is just KK obviously.
Also, there maybe one on the horizon from the Keith shop with even more points and even fancier rings! The most impressive thing to me is that he uses not computerized assistance, or panto graphs to create his works of art.
Keith is in my opinion the most talented builder in the world. PLUS, his cues play even better than they look!!! I won't be playing with anything else!