This water tank from DeWalt is ideal for use with cutoff saws like the DCS690 and newer DCS691, as well as core drills with water delivery systems such as the DCD150 and its stand the DCPS151. This uses the same WTC or Wireless Tool Control system as DeWalt's automated dust extraction systems. What this means in practice is that as soon as you start drilling or cutting with one of those machines, this water tank starts delivering water at a consistent rate. Shortly after you stop, the water delivery also stops automatically.