Features Simply put a vacuum flange onto SKD-BN500L series for picking up non-magnetic type screws, such as plastic, aluminum, and stainless steel made screws. For different dimension screws by switching different bit nozzles without changing vacuum flange The small and handy exclusive vacuum pump is available for all vacuum type of screwdrivers. For better and efficient way is to place all screws over a screw setter and then use vacuum type screwdrivers.