When I unfolded this saw, it reminded me of a pocket knife.
The blade is stored in the handle, and when it’s time to saw, you unfold it, and lock the blade into the fully extended position.
Then you get to sawing. It saws well. It’ll cut through tree branches as thick as your wrist.
Unless you have huge trees, this saw is more than big enough for most tasks. It’s perfect for small fruit trees.