If anyone happens to have a set of these, could you let me know the measurement of the (business) end? The website doesn’t give the dimensions unfortunately. I want to turn some chair spindles at 5/8” tapering down to 1/2” or maybe 7/16” if I can keep the middle steady enough(!). So I’m hoping the matching set of 1MT ring centres are 3/8”. Knowing the measurements would save me a half day round trip to the shop and would be much appreciated .