The Easton CXN Replacement Steel Runners are designed for any skate of out the Mako and Mako II skate lines. They are engineered to work with the Easton CXN holders and they come standard with a 9 foot radius.
The Easton Razor Bladz is the most recent update to the holder model. Made from Zytel, an impact and abrasion resistant plastic. You can find this lightweight holder on most recent model Easton skates including the Synergy EQ50 and Stealth S17.