The Victorinox Hiker Swiss Army Knife is a great knife for hiking, or just for puttering around the back yard-- it includes a sharp wood saw, three screwdrivers and two sharp blades.

HINT-- If you're looking for a Swiss Army Knife with a wood saw, consider one of the 111mm Trekker knives. They won't fit in your pocket as well, but their larger size means that the wood saw will be more effective.

Camper-- replaces phillips head screwdriver with a corkscrew
Fieldmaster-- adds scissors and a hook
Mechanic-- replaces wood saw with pliers
Super Tinker-- replaces wood saw with scissors
Tinker-- no wood saw
Trekker-- no small blade, larger knife (4 3/8" / 111 mm) with locking blade