Description::this kind of tool is that all of the wastes are sucked into the blade cavity and then taken out by the waste-discharging material, this makes the waste-discharging more smoothly and it is one of the main methods of waste-discharging for big size waste in the field of die-cutting due to the obvious advantages, such as easy waste collecting, cost saving, and minimum damage of the blades. it is most suitable for the production with 3-10mm of dimension of round holes.