The BOREAL21 is a revolutionary 21 in / 53.3 cm folding bow saw that effortlessly unfolds in seconds for easy, high performance cuts. At 21inches, the blade's length is optimally sized for powerful sawing strokes, and yet short enough for packability. And the 3 hinged trapezium-shaped frame allows large diameter cuts. The blade safely folds into the frame when not in use, protecting you and your gear. The BOREAL 21 is a pleasure to use. It's light, very well balanced, has sufficient blade length to make ample power strokes, and the aggressively angled teeth on the blade cut quickly and smoothly. Enjoy your time outdoors!