BIHUI Dust Extraction System for Drilling. 
Collects dust and water when drilling while acting as a guide, suitable for drilling up to 72mm. 
Simply connect to a vacuum cleaner with the nozzle diameter of 25-35mm, the air is channelled producing a against the tile. 
Flexible rubber gasket that maintains the connection with the vacuum.
Suction that seals even on uneven surfaces.
Suitable for drilling up to 14-72mm hole saws.
Supplied with adaptor for connecting to vacuum cleaner.