Opinel #12 Folding Pruning SawDescription The Opinel Gardeners Folding Saw. The saw uses the Sandvik 12C27 modified stainless steel, so they do not require any special care, which is ideal for use in the garden and the exposure to elements. This steel has a carbon content of at least 0. 40% giving it an excellent cutting edge. The SawA designer gardening saw with a well thought out design that enables a clean cut without damaging the bark. The unique feature of the sharp teeth,