This set of 5 holds consists of shallow two-finger pockets. You can expect three-quarters of a finger-pad for depth. Set #6 yields about one V-grade harder than Set #5. The incut angle on Set #6 is neutral to slopey.
Since the incut on vertical is already slopey, this set is intended for intermediate to expert climbers. School is out when it comes to this set. This type of hold is for climbers with tendon fitness.
On a vertical wall, you have entered V3+ difficulty. As the wall gets steeper, the difficulty increases quickly. A 20-degree overhanging wall will yield V4 and V8+ on a 45-degree wall.
Each hold has a smaller version of the intended pocket. It is found by the bolt hole. So if you want to jack up the difficulty, rotate them to the more difficult side.
Here are links to view all of the Golfus Pocket Line. Set #1 is the easiest, and Set #6 is the hardest.