Billions of aluminum caps and lids are punched with Gruber punching tools. Our specialty is the punching of caps for medical vials, with a single punch a perfect shape is created. Gruber tools are literally floating on air with no strings turning soft or breaking down. Our toolmakers are extremely experienced and highly skilled, as they are capable of assembling tools with mechanical tolerances beneath 3 microns. Gruber guarantees 80-100 million punches between servicing of our cap processing tools.