Lathe Tailstock Die Holder Set
LATHE TAIL STOCK FLOATING DIE HOLDER SET
MT3 SHANK SIZE 
Die Holders can Easily be Interchanged and comes with 4 Different Size Holders as : 13/16" , 1", 1-5/16", & 1-1/2" 
The Die Holders Travels Smoothly over the Straight Shank. 
A Very Handy Tool for Threading on Lathes which can adapt 3 Morse Taper