grasp

When a finger grasps the convex-concave edge of the fulcrum, it usually holds it tightly. But many times, some fulcrums can be grasped with the palm of your hand, and it is not necessary to rely solely on the strength of your fingers. Grasping with the whole palm can also increase the stability of grasping.

tennis grip

If the small holes on the edge of the fulcrum or some points can support the second joint of the finger, the hand can lie flat on the rock surface, so that the hand can be opened, the fingers can be close together, and the fingers can fully contact the fulcrum, so that the whole palm does not need to hold the fulcrum. In this action, the thumb generally has little effect, but if the fulcrum is inclined, then the thumb can hold the point with other fingers. Generally speaking, if the fulcrum is round, the open grip method is the best choice.