Big Rocks Manufacturing

Investing In and Growing U.S. Based Manufacturing​

Maximize your potential

Small manufacturing business owners, discover how Big Rocks Manufacturing embodies Franklin Covey’s strategic approach to prioritize your business’s essentials. Our philosophy centers on managing the ‘smaller rocks’ — HR, accounting, administration, and social media marketing — through shared services. This enables you, the executives, to dedicate your energy to ‘the big rocks,’ the core aspects you excel at.

We’re also keen on partnering with companies looking for growth or considering sale opportunities, providing support and guidance every step of the way. Join us in focusing on what truly matters and elevate your business to new heights. Reach out to Big Rocks Manufacturing today and let us help streamline your operations and achieve your goals. Your future self will thank you!

About us

Big Rocks Manufacturing  is the premier provider of top-quality manufacturing services across multiple industries.

Our extensive portfolio of companies includes world-class engineering, precision machining, metal fabrication, powder coating, and tool & die services.

We take immense pride in providing the highest quality manufacturing services and unmatched customer service. Our experienced and knowledgeable team has the expertise to deliver outstanding results for any project, no matter the size.

Thank you for considering Big Rocks Manufacturing as your manufacturing partner. Let us help you achieve your goals and take your business to new heights!

Our services


When it comes to engineering, our expert team specializes in product design, prototyping, and testing - delivering nothing but the highest quality products and services for our clients.


We offer expert stamping services tailored to diverse manufacturing needs. With a focus on quality and precision, we deliver custom solutions that exceed expectations.


Our precision machining services are second to none, utilizing state-of-the-art technology and equipment to produce ultra-accurate and top-quality parts that exceed expectations.


We offer custom fabrication solutions for a diverse range of industries, including agriculture/construction, heavy trucking, and manufacturing, through our top-of-the-line metal fabrication services.


We offer specialized manufacturing services, including tooling, CNC machining, and metal stamping. Our capabilities range from designing and building various dies to precision machining with advanced equipment. We handle projects of any size, from single prototypes to large production runs, using 18 presses for metal stampings. Our focus is on delivering high-quality, custom manufacturing solutions tailored to meet specific requirements.


We also provide top-tier powder coating services, ensuring that metal products receive a durable and long-lasting finish that protects them from the elements and prolongs their lifespan. Plus, we provide distribution services to ensure timely delivery of our clients' products in perfect condition.

Our Companies

We are your comprehensive solution for engineering and product development, offering reverse engineering and technical specs manufacturing packages alongside a broad spectrum of services.

Founded in 1973, Mack Hils Metal Fabrication is a full-service metal fabrication and precision machining firm serving a diversified and large domestic marketplace.


A high-quality precision machine shop situated in the St. Louis Metropolitan area that has been in business for over 25 years and focused on customer service.


Looking for high-quality powder coating in Missouri? Our state-of-the-art facility has got you covered with our heavy-duty powder coating track system. Trust us to deliver a durable and flawless finish every time.

Mack Products has provided the finest quality reproduction parts for antique pickups. All pieces are authentic reproductions, with Mack Products carefully matching all parts to the original material, gauge, form, and finish. 

As an ISO 9001:2008 certified supplier, we aim to be your single source for Tool & Die, CNC Precision Machining, Wire EDM, Metal Stampings, and more, ensuring quality and timely delivery at competitive prices for any volume.