Spacer washers for setting the gap between milling and scarifying cutters on a cutter shaft, so the cut pattern stays even across the drum. KRUG (IKRU) categorises its spacers by host system: Airtec, Blastrac-Husqvarna, Contec, Schwamborn and von Arx drums each take their own spacer, alongside a general-fit range. Fitted between the cutters themselves. KRUG GmbH (IKRU), Luedenscheid.