with drill air cooling (pressurised run required on site)with speed and stroke control drill bit cooling and lubrication,continuously variable stroke and spindle speed control an easy to operate sliding table als well asDürselen drill belt for drilling support Different spacers according to each hole pattern allow quick and easy set-up of the drill heads. Spacers for the most common hole patterns come with this model like with all Dürselen paper drilling machines.Dürselen PB.04N is a paper drilling machine for heavy duty use - suitable all drill bit diameters and difficult substrates like coated paper and plastic film. Even under heavy duty use there is no need for maintenance or lubrication.