It would convert 1 inch to 3/4 an inch to fit a 3/4 diameter blade inside. I've looked on the shop though and there's no blade holders like this. Am I best with just using the sink tube end as the blade holder, or should I just get a 1 inch to 3/4 reducer, similar to how this guy did it: https://www.youtube.com/watch?v=xwuPVPKL8PU