The Maltby Pro Series UL Graphite Wood shaft will fit the Cobra S2 and the Taylor Made RBZ Drivers. However, both are adjustable drivers and have adaptors. We do not have an adaptor for the Cobra S2 driver. That driver was around 2010, I believe. We have an adaptor that fits a lot of the Cobra drivers over the years, but i do not believe it would fit the S2. The link is below to the aftermarket adaptors we have for Cobra:
We do carry adaptors for the Taylor Made RBZ. The code number for it is TM0017. If it is the RBZ Black, it would be TM0023.
You can remove the current adaptors and use them on the new shafts. If your not experienced in removing them or do not have the tools, might be best to to just get the new adaptor, at least for the Taylor Made.