Large bore diameter is suitable for large drill bits and core drills with a maximum size of Ø135mm. Maintains a clean and safer working environment. Dual air chamber provides suction to the wall as well as dust collection. Rubber seal keeps suction to the wall and stops dust from escaping. Adjustable hose nozzle can be swivelled so that user can reposition hose with ease during use. Hose nozzle is adaptable being able to fit hoses between Ø27mm and Ø58mm in diameter.