This Vox article analyzes the nuanced language that Kavanaugh will probably use in his hearings: “Roe is settled law,” etc.
Does it really matter, though? It doesn’t matter what he says in Senate hearings; if he holds pro-life views deep down, then he’ll vote against abortion when he’s on the bench. Forcing him to say certain words during his hearings won’t change his future SCOTUS decisions - he could even outright lie (“I will not vote to overturn Roe”) and then vote to overturn Roe when the time comes. No SCOTUS justice has ever been impeached for behaving differently as a justice than he/she indicated he/she would during hearings. Furthermore, few if any pro-choicers would believe Kavanaugh if he said he wouldn’t overturn Roe.
And at the end of the day it will be a party-line vote anyway; nearly all Democrats (except perhaps Heitkamp, Donnelly, etc.) will vote against him - no matter what he says or does - and likely all Republicans will vote for him - and he’ll end up passing 53-47 or something similar.
So is it really necessary to do this song and dance? The Vox author is concerned that Kavanaugh will try to slip by with weasel words, but even if he didn’t weasel, the vote would still be much the same and his future SCOTUS decisions would be unchanged.