Circular tooth knife series pneumatic hole punch: mainly applied to punch hole for PP, PE, OPP, PVC, CPP, aluminum foil, aluminized film and variety of plastic bag materials. The R0.25 sharp corners point are commonly used specifications, and the double cutter bag making machine usually size is R0.5-R1. Available made it by slot 50MM, slot 150MM, slot 200MM,slot 250MM and gantry frame etc structure.