Profile: Tw Design and Manufacturing, LLC. is a CNC machine shop. We are an ISO 9001:2000 certified company. We offer precision CNC milling and turning services. We also provide prototype machining, large & small production runs, inventory management programs and temporary outsourcing services. The materials machined include stainless steel, carbon steel, hot rolled & cold rolled steel, structural steel, alloy steel, cast iron, ductile iron, brass, copper, aluminum and plastic.