The bridge is the part on a guitar that rests on the body (or sound box) of the instrument, and holds the strings up in their correct positions. Bridges come in a wide variety of shapes, sizes and forms, especially on cigar box guitars. Some may have a separate saddle piece, while others do not. Some of the more popular bridges used on cigar box guitars include threaded rods, wooden bridges, banjo-style bridges, mandolin-style bridges, electric guitar-style adjustable bridges, and more.
Usually a bridge will have some sort of notches or grooves to help hold the strings in place. The placement of the bridge and the nut are what determine the scale length of the instrument, as well as the action height of the strings.