You can train on climbing training board for your arm and finger strength at home. If a climber wants to increase his “climbing level”, it won‘t go without training.
A climbing hold is a shaped grip that is usually attached to a climbing wall so climbers can grab or step on it. Climbing holds come in a huge variety of shapes. And also, they come in a large array of size and to provide different levels of challenge to a climber. Different volumes of climbing holds allow climbers to focus on different techniques and movements. But it is not the specific shape that matters, but rather how that shape can be utilized. In fact, even turning the same one upside down might result in a completely different type of hold.