Starrett 7 Piece Deep Cut Plumbers Hole Saw Set
This set is specifically aimed at people in the plumbig trade.
The Hole Saw dimensions are as follows:
19mm, 22mm. 29mm, 38mm, 44mm, 51mm and 57 mm
It also includes two Hole Saw Arbours.
They also give a deeper cutting depth from a brand you can trust.