Many Leatherman tools include a wood saw.
The Leatherman wood saw is larger and more robust than the saws found on Victorinox and Wenger Swiss Army knives. It is also every bit as sharp, so use caution! It works best in materials less than 50mm / 2" in diameter-- we have used it to cut through a piece of 2x4 lumber (40 x 80 mm) in less than a minute.
The wood saw usually is between 72mm and 77mm in length (about 3").