This was the best adapter Revain offered. . . I wanted a "short taper" to fit my NOVA Comet tailstock. . . Here's what I did: I placed it on the Mini-Drive MT1 cone tip, clamped everything between the tips and cleaned it to about 2.5 inches with a DREMEL EZ-Lock cutting wheel. Thoroughly cleaned and voila! I have a "short" MT conversion adapter! in MT2 which can be used with an old set of live centers and mini drives to fit my tailstock.