Signature 4 is a custom manufacturing partner based in Coldwater, Ohio, serving businesses locally and across the United States. Since 2000, we’ve helped companies bring complex, high-quality products to life by integrating design, engineering, manufacturing, and decorative finishing under one roof.

We specialize in projects where execution, appearance, and scalability matter. Our team supports customers from early concept through full production, delivering brand-sensitive components and assemblies that meet demanding quality, consistency, and timeline expectations. Signature 4 works across a wide range of industries, including appliance, specialty vehicle, industrial equipment, commercial products, and OEM manufacturing.

Our capabilities span metal and plastic fabrication, die casting, injection molding, vacuum forming, CNC machining, assemblies, and advanced decorative finishes. What sets us apart is not just what we make, but how we make it — with attention to detail, disciplined processes, and a deep understanding of how design, engineering, and finish impact the final product.

From startups validating a new product to Fortune 500 companies scaling production, Signature 4 acts as a long-term manufacturing partner rather than a transactional vendor. We are known for solving complex manufacturing challenges, maintaining consistent quality at scale, and delivering results that reflect our customers’ brands.

Rooted in small-town values and built on decades of hands-on experience, our team takes pride in craftsmanship, accountability, and relationships. At Signature 4, our people make the difference — and our work speaks for itself.

Signature 4

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