EXCALIBUR FX-KS101-CS Fox Sports Basketball Keychain. Fox Sports Handheld Keychains offer the same exciting play as the rest of the Fox Handheld Games lineup, but in an even more portable, dual-function design. You get all the the same sports action, plus three levels of difficulty and easy-to-use controls. Play five-on-five basketball wherever you go. Shoot three-pointers, dunk, block, steal, and pass. Choose between single game or tournament modes.