It takes a bit of effort to pull and push the unit. The smaller diameter also gets into the corners better. Pull back sleeves on the quick connector fittings and attach the extensions together.

Pressure from the washer gets halved since there are two nozzles. No rotation on unit. It performs slightly better than a powerful hose stream.

This product is junk. Technically it works and is therefore not a defective product. Save your money and stay away from this defective, cheap junk. Buyer beware and don't make my mistake!