Insulin injection pens are literally lifesaving devices, allowing millions of diabetics to administer medication to themselves whenever needed. For insulin pens to work, they need to be easy to use, and it is absolutely critical that they deliver an accurate dose. To achieve this, the pen’s dosage selection mechanism must be manufactured to high precision. But these are plastic parts, produced in high volume, and cost is a factor. This article reviews how three organizations – laser system supplier Coherent, Scandinavian machine builder (and Coherent sales partner) Masentia, and assembly equipment manufacturer SVM Automatik (a Stevanato Group brand) – partnered to develop a cost-effective production solution for precision marking the scales of insulin injection pens.