These holds are great trainers to that pocket friction and strength. However, they are not for the faint of heart. These things are quite powerful at steeper angles.
At a 45 I could only sort them out to be a V7/V8 at the easiest. That was with a fairly packed wall and open feet on a 12x 10 board.
I didn't quite want to add a 5-star review because I felt like one of the holds was a little bit of a step hard than the other ones in the set, which almost made me feel like a set 7 should be sculpted around that one, or making it have a tiny bit more depth to match the rest.