The dewalt dmw902m is a brand new high power 39m class39 dust extractor manufactured to comply to the latest european safety guidelines rated as an 39m class39 machine this 35 litre capacity wet and dry unit removes dust from the working environment in such a way that it leaves no dust particles greater than 01 milligrams per cubic metre of air when in use making it extremely efficient and a boost to the health and safety rating of a worksite suitable for use with both concret