The screw screen could be manufactured in a fine range and can be used in industrial treatment plants as well as inlet structures and municipal wastewater treatment plants. They are mounted in the channel with an angle of 35-60 degrees for lower flowrates whereas, for higher flowrates they are mounted parellel to the channel. Screw screens are either with a brush or spray mechanism the solid wastes are collected and dumped into a container. These screens can be manufactured from Aluminum, Epoxy coated or galvanized steel or stainless steel and also from triangle or circle sectioned special sheet metal.