Agpoint Disc Weeders
Agpoint produces a complete disc weeder assembly ready to attach to a toolbar.

The disc weeder is supplied with a 14″ disc attached to a 22″ x 36mm round shank.
Two different hubs are available: The OM4 convex type hub is attached to the inside of the disc, and the OM5 concave type hub bolts to the outside of the disc. See drawing below.

View Disc Weeder » (Data sheet as PDF).