A carpenter's fastener is an essential tool for any carpenter. It includes a SCREW, which is a metal rod with a helical ridge that is used to hold two objects together, a tnut, which is a type of nut with a threaded hole in the center, a NAIL, which is a thin metal rod with a pointed end that is driven into wood or other materials, and a nailgun, which is a device that uses compressed air to drive nails into wood or other materials.