Screw spirals are designed to move all kinds of granular and powder materials horizontally. With leaves in the form of screws they are used to transport granular and powdery materials horizontally . Inner-moving or moon-shaped models are used to mix or stir the product. Spirals can be applied right or left directed leaves to suit usage purpose. Diﬀerent types and models are available for diﬀerent capacities. According to extra requirements, the can completely be produced from “AISI 304” stainless steel.