The Rockler Dust RIGHT 4" Tool Ports Pack Of 2 is a set of two tool ports designed specifically for dust filtration in CNC machines and other industrial applications. With a focus on efficient dust collection, these tool ports work at two different speeds to effectively capture dust and debris from tool bits and other machinery. Perfect for improving air quality and maintaining a clean workspace, this product is ideal for businesses in the metalworking and manufacturing industries looking to enhance their filtration equipment.