Dunkelheit

Hi. Reading usual German catalogue of garden equipment, I faced the following pun in a header: Wir geben Ihnen unsere(n) Sägen The chapter about chainsaws began this way. It was suggested that there is a pun, which means: "Wir geben Ihnen unseren Segen". Could you evaluate it and what is the semantics/humor in this? It looks rather forced for me. Thanks.