@Bamboo The stem is mere 14/15mm. And I had a hard time cutting it. I found another pruner and it makes the job much easier. I had to return Wolf-Garten one cause I either received a bad product or the product lacks leverage and power.
My wolf garten ones that I linked to previously cut better than the wollf ones you bought, and more cleanly than the KASB image shows too. But you can't get them where you are.