I have been a ac tech for 17 yrs . And now with the r 410 systems becoming more prevealt,I've been seeing a lot of new tools on the market. Can anyone tell me what the difference is between a r 22 flareing kit and a r410. I do not want to buy one if I don't need one. Thank you

If you are talking about a flare tool for working on copper tube there will be no difference.

I second that, copper sizes will stay the same. A different set of gauges will be required.