What’s the collective noun for a group of Shafts?

Shaft (L-R) ALEXANDRA SHIPP as Sasha, JESSE USHER as John “JJ” Shaft, SAMUEL JACKSON as John Shaft and RICHARD ROUNDTREE as John Shaft, Sr.

Because here’s three of them:

Yep, there’s a new Shaft movie out soon, featuring the original Shaft, Richard Roundtree, his nephew from the 2000 Shaft, Samuel L Jackson and Jackson’s son Jessie T Usher. No trailer yet for the new Shaft, sadly, but you can have these for the previous two Shafts to tide you over.