3MT & 2MT Lathe Alignment Test Bar Set
Shank Size - MT 2 
Overall length : 11-1/8" ( 283mm )

Shank Size - MT 3 
Overall length : 13-3/16" ( 335mm ) 

PRODUCT SPECIFICATIONS:
:Re-align the tail-stock on your lathe to eliminate that slight taper  when turning over a long distance.
:Manufactured from EN31 Alloy Selected Steel. 
:Useful for alignment test between centers as well as in Morse Taper Spindles.
:Accuracy within 1 to 5 micron. 
:Max.run-out : 0.0002".