This Chronos Disc Holder Frame is a universal attachment for mixers with #12 hubs, and complements other Chronos Mixer Attachments, such as the Grater and Shredder Discs, Central Models #30R-030, #30R-031, #30R-032, #30R-033, and #30R-034. These Chronos Mixer Accessories are also ideal add-ons for Chronos Planetary Mixers that feature a #12 hub, including models: #30R-002 - 20 Qt. Planetary Mixer, #30R-003 - 30 Qt. Planetary Mixer, and #30R-004 - 40 Qt. Planetary Mixer.