This folding bow saw packs up into its own frame and assembles quickly and easily with no loose parts - it simply opens and connects with one smooth motion.  The blade measures 53cm (21") which is optimal for getting a good saw stroke in without compromising its compactness.  It is made of high strength extruded and anodized aluminum so it won't twist as you're cutting. The frame is big and sturdy enough for large diameter cuts (up to 6") and yet the entire saw weighs just over 500g (1lb).  Durable duck canvas storage sheath sold separately.