I climb at a V3/V4 level in the gym, and generally feel like my weakest point is crimping. To work on this at home, I started by purchasing the 1/2 inch 90 degree system crimps to really push my limits. That's been good, but I can only use those for so long before my finger joints start yelling at me. Wishing to avoid a tendon injury, I decided to add a set of these as well to have more versatility on the wall. A 1/2 inch makes a HUGE difference!