I can tell you they don't work very well as pruning shears (DD demonstrated that to me). We said a reluctant farewell to that pair, its hinge loosened beyond repair.

These are generally semi-disposable items, usually provided by the employing agency.

When the manufacturers come up with more bling (cocabola handles instead of black plastic and engraved blades) perhaps there will be an EMT shears forum (tentative name - shear delight).