I am currently using these on a 13 degree wall in combination with a few of the small golfus crimps set #2. At this angle, they feel like v4-6 to me. I had them initially on a 35 degree wall, but I could only hang on them and couldn't move. On the 35 degree wall I'm using a combo of sets #1 and #2, and that feels like v5/6. I intend to swap in set #3 holds on the 35 degree wall problem, as a means of progression. Of course, I have yet to send that set #1 and #2 problem...