This set of rock wall holds offers a ¾ of a finger pad to a full finger pad of crimper edge. On lower angled walls, you'll find that you can pinch and really dig your fingers in on various parts of the hold. When the angle of the wall gets steeper, the thumb that felt so good when the hold was on a vertical wall becomes a thumb catch on various parts of the detailed sandstone design. Crimpers, especially on steep walls can cause tendon injury. If you are beginning to learn crimping climbing, be sure to be properly warmed up and on lower wall angles. Stay away from dynamic moves. You can easily shock load a tendon and injure it. Climb safe.