I usually make a wedge out of jujube branches, and then tie the buttons on it with thick fishing lines. Then pick up the button with thin wire. The button is oval, and the diameter is controlled at 7-9 cm. I usually measure by hand when I leave the ground. The button is just above the big mother and son. Try to find a downhill slope when you buckle. Personally, I think this button is not as good as a set of foot buttons. The simplest is the steel wire clip, which is as simple as covering it with plant ash.