Cleavers are primarily used for cutting through thin or soft bones and sinew. Traditional materials include linen, hemp, other vegetable fibers, sinew, silk, and rawhide. Both horn and laths may be bound and glued with further lengths of sinew. The Mongols used composite bows made from birch, sinew and the horns of sheep. The tongue of the chameleon is a complex arrangement of bone, muscle and sinew. The bison provided meat, leather, and sinew for bows. They wear strong, warm boots fashioned from the hides and sinew of their reindeer. The first stone throwing artillery also used the elastic properties of sinew. Sinew and hide strings may be seriously affected by water. They provided skins for clothing, sinew for tying, and other purposes. Every sinew in my body came together in one perfect whole. One end of a foreshaft was attached to a projectile point with pitch and sinew. "I will resist a war with every sinew in my body", he said. Arhat Hands and an internal practice called the Sinew Metamorphosis Classic. Later torsion siege engines appeared, based on sinew springs.