I had one of these so I could use a 1-1/2” cutter in my Bridgeport. Try putting that in an R8 collet
Actually helpful on a mill drill. Gives some room to swap a cutter for a Chuck and twist drill without having to raise the head and lose register.Good bit of kit, but they rob you of a bit of room in the z-axis compared to collets that fit into the end of the spindle. Only an issue on smaller machines of course.