Provide us with a challenge or send us a product sample for free documentation on punch-ability. Gruber tools are cutting coal filters, technical textiles and titanium strings as well as 10 micron membranes in low and high density plastics. Our profound knowledge on punching and welding techniques, packaging materials and special machinery has resulted in several interesting projects such as placing 3 layers of film in a plastic membrane smaller than Ø=5 millimeters.