Welcome to the sale of this used Hilti DD250 Diamond Core Drill Kit, Rig, Base & DD VP-U Vacuum Pump. Please feel free to call 07795166522 with any questions. We have around twenty kits available at various prices in various sizes and condition. These include Hilti DD100, DD150, DD200 & DD250 Models. They are all fully tested by drilling holes into stone using all its four gears along with the water feed.