50NL Another extraction Question - Flopped set

[Berge20]

Any reads on his bet sizes? That's a fairly weak on a drawy board and a weak turn bet.

He cold called the PFR getting solid odds and position, so his range is wider here. Could be 55 I suppose, but more likely QK/KJ type weakish one pair hand that isn't sure where he's at, but has top pair and still bets.

Not sure what would call the CR other than KK/55 or like AhTh?