This is one of my favorite sets of holds when setting for the intermediate to advanced climber in overhanging terrain. They have been designed to offer three distinct edges to stand on. There is the main edge which is the largest, and then to the left and right, you get a much smaller edge on a different angle. So if precision footwork is your goal, this set is for you.
The incuts on the holds make them great footholds for steep walls when route setting above V4. For the beginner, choose this set for vertical to low-angled walls to teach engaging your big tow to stand on small edges.
You might consider these as micro-crimps for the expert climber that regularly sends V8 granite boulder problems. I've left the sharpness on them because they are meant to be footholds; however, if you use them as micro-crimps, I recommend toning the front edge down with sandpaper. Nobody wants a flapper when training on plastic.
For the climber looking for a more clean line gym-style hold, check out the 25 Steep Wall Technical Footholds.