Zhoushan Howly Screw Co., Ltd is one of the largest manufacturers, We specialise in the manufacture and refurbishment of extruder screws and barrels for the rubber, plastics and feed industries. We strictly select high-quality alloy steel (38CrMoAIA) to produce screws and barrels. Our products have features of high precision, wear resistance and corrosion resistance through heat treatment, Nitriding treatment, Hard-chrome electroplating, Bimetallic alloy welding and other processing ways. We can manufacture most types of extruder screws, injection moulding screws, twin screws and rubber screws used in the plastics, rubber industry's. We can also refurbish any size of extruder, ranging from the smallest lab screw up to screws of 600m/m dia and 6 metres in length, using all types of Hard facing materials. Our products have been distributed to Europe, America, Oceania, Asia, Africa, the Middle East, etc. We will make more efforts and continue to provide perfect quality and services for our customers.