12" Nova Cole Jaws with Extenders to 15" and HD workholding kit (Nova 6040, 6039, 6030) For large bowl turning (requires 16" or larger swing lathe Also includes 8 extra long mounting screws for double jaws use (see description) Kit includes 6040 12" Cole jaws, 6039 12-15" Cole jaw adaptors, and 6030 buffer acc. kit Recommended for Supernova, Supernova 2, and Nova Titan Chucks Please see item description for more details.