You will need several Yokes to truly enjoy the full benefit of the squeezer. The good news they are interchangeable with the hand squeezer (You need one of those too BTW) I have the 4" Thin-Nose, 3" Yoke and the Flange Nose.
I personal find the longeron yolk most beneficial as if helps you avoid having to buck many many rivets. Although there is no way I would enjoy life without a 3" and a no hole yolk.