The document discusses the functions of various carpentry tools. It describes how tools such as planes, chisels, sanding blocks, and saws are used to shape, cut, and smooth wood. It also explains how power tools like routers, jointers, planers, and power sanders now perform many of the tasks that were previously done by hand tools and help carpenters work more efficiently. The document provides examples of how different types of tools are used in carpentry work.