NDD570A Automated DustCare Dry Vacuum Cleaner - NumaticNDD570A Advanced Filtration Twin Motor Vacuum Cleaner Numatic This is now discontinued the replacement is NED570 The NDD 570A is designed for use with within the building industry in conjunction with power tools that produce large volumes of fine dust. The 'A' in the name denotes its Auto feature that powers the vacuum up only when the connected power tool is turned on. This simple feature allows the operator to concentrate on the job in hand without