This dust shoe is for the workbee and is independent of the z axis, no worrying about the bristles getting caught in the bit.
The base is held in place with magnets giving easy access to the bit and lock button, The Brush Is removable, to enable a refit of a new brush due to damage,or exchange for the 67mm overall brush that is available as an extra.
This model is for a 65mm spindle with various outlet sizes