This part is compatible with Haas machines.
This tool is for checking the center line of tool holders and tailstock alignment. It has no sag and different sized shoulders for different work-holding set ups. It comes with 1.5″, 7/8″, 3/4″, and 1/2″ shoulders which can be rotated to fit your needs. The bore hold is 0.180″ to fit standard test indicators and inter-rapid indicators; the total length 5″.
Disclaimer: this aftermarket part was not manufactured by Haas.