The Yoke is the "Y" shaped piece, with a 1" steel shaft.  The Yoke Barrel (sold separately) is placed over the Yoke's shaft, which allows the picker section to articulate with grease fittings.  The Yoke fits on both the Innovator and Innovator Plus pickers.

We also make a Heavy Duty Yoke, which you can select by clicking on the blue drop-down menu.