Heavier than old dough hook of Krups

The dough hook are significantly thicker and heavier than my old original, but fit into the Krups machine. Since the delivery took place erfolte without original packaging, I'm not sure if it really is genuine spare parts. A hook has at one point at a clearly visible and perceptible notch in the metal, which was not the case with my previous dough hook. But this should be so even with all new kneading hook from the factory, I was told. Annoying: This item costs only a few days after my order now four euros less. I hope these things now hold at least as long as my old dough hook.