When choosing the air nipper, it is necessary to pay attention to the diameter of the sprue that needs to be cut. The indicated figure is valid as long as the sprue material is a soft resin (e.g. PP, PE, urethane, PS, PVC etc.); if the resin is a hard type one (PPS, PA, PBT, ABS, PC, containing glass etc.), cutting capacity is reduced by 35%. Also, remember to select a blade with brazed cemented carbide tip. New NW-50 and NW-50R models are able to cut a sprue with a diameter up to φ5 mm. Mini air nippers can perform both push and pull operations according to the various models, so that the blade slides to the surface ensuring a perfect cut. A wide variety of blade types (standard, thin, reversed, long, clip) are available, in order to suit different applications.