Clamp is one of the very useful tools for carpenter. It is used to hold the object tightly, without any movement in order to perform the drill. Without clamps, by just using both of the hands, it is impossible to perform the job nicely and correctly. During the secondary school, we have a class that needs to saw the wood into 2. We use the clamp to hold the wood, and start sawing. If not, I am not sure how are we going to saw it since the wood is a small piece of wood, not a long one. If is is a long wood, we still can use our leg to step on it and saw.