If you have a Noga indicator stand and want to attach it to the tab on the back of the indicator, use it with the Starrett PT00764 Split Sleeve. The sleeve adapts the 1/4" OD of the 657Y stand to the 3/8" ID hole of the noga holder. Note that if your dial indicator already has a 3/8" shank, it can be fitted directly to the Noga bracket without additional fasteners.