Jaws for the NCK-SN4 are compatible with the following chucks: 
Super NOVA2, G3 Nova, Robert Sorby Patriot, Record Power SC3, Record Power SC4, Charnwood NEXUS3, Burt NCK-G3

Includes:
1 x SN4 Chuck M33 x 3.5 direct threaded body; 
1 x Tilt-Away Handle
1 x Standard NCK-SN2-JS50N Jaws
1 x Wood Screw
8 x Fixing Screws
2 x Hex Keys