Makita 18V Surface Scanner Tool Only DWD181ZJCapable of detecting a variety embedded objects such as; metal, wood, plastic and shielded electrical wire up to 180mm deep Selectable base material modes allow for increased versatility in dry concrete, wet concrete, wall partitions (wood or plaster board) and hollow block Simplified user interface displays center, edge position, relative width and depth of embedded objects Multi detection mode allows for scanning in up to three parallel surface