Set #5 in this series is double incut, meaning that the steeper your wall gets, the more the second incut comes into play. They are V2 holds on a 45-degree wall and V0 on less steep walls. They are incut enough to use on roofs which will feel in the V3/4 range.
Three angles to the incuts allow you to bite down with your fingertips into the double incut.
If you are looking for super-positive jugs for steep terrain, Set #5 is a good choice.
You may also be interested in the following sets: