Product Description:
Converts your lathe's #2MT dead tailstock to a 1" x 8tpi threaded live tailstock.
✔Mounts to tailstock with the included #2 Morse Taper arbor.
✔After being mounted, tailstock is converted from dead to live and it will accept all 1" x 8tpi threaded lathe tool accessories.
✔Ideal for an additional secure workpiece mount from tailstock end.
✔Allows precision centering of spindles or dowels at the tailstock end.
✔Provides the ideal system for the mounting of bowls for hollowing.
✔Wrench is included.

From the Manufacturer:
▲Live Tailstock Chuck Adapter-2MT tailstock mount, 1-Inch by 8TPI Chuck Mount.
▲This unique adapter allows precision centering of spindles or dowels at the tailstock end.
▲Also, it provides the ideal system for the mounting bowls for hollowing; after turning the outside of the bowl blank, turn a tenon on the bowl bottom.
▲Then mount your chuck to the tailstock using this adapter; grabbing the tenon with the chuck while still attached to the faceplate.