About K-O Products & Manufacturing Company
Built on experience.
Driven by people.
First class people doing first class work. That is the commitment behind every part we make.
Benton Harbor, Michigan · Since 1938
A lasting commitment
to making things.
For generations, metal stamping has been the backbone of K-O Products & Manufacturing Company.
Operating in Benton Harbor, Michigan since 1938, K-O combines manufacturing experience with direct, personal relationships. Since 2025, owners Attaff Moosa and Jonas Muthana have built on that foundation, keeping our experienced team while investing in new talent, equipment, and precision grinding capabilities.
Our mission
Quality. Fair value. Shared growth.
To provide our customers with products and services of the highest quality at a fair price, to maximize growth for all.
Our core values
Service above
and beyond self.
- Respect individuals
- Value and appreciate the diversity and uniqueness of each person.
- Communicate honestly
- Act with integrity and communicate truthfully.
- Listen and follow through
- Listen, share ideas, act on decisions, and produce positive results.
Our history
Built over generations.
Moving forward.
From our first shop in 1938 to a new chapter of growth. Follow the milestones that shaped K-O Products & Manufacturing Company.
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1938
Origins
K-O Products & Manufacturing Company is founded
Mr. Cayo starts the company in a 15,000 sq ft shop on Route 139 in Benton Harbor, Michigan.
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1987
People
The Herrold family takes over
Barbara and Dennis Herrold buy K-O Products & Manufacturing Company from its founder and begin a new chapter of growth.
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1997
Quality
Early ISO certification
K-O becomes one of the first metal stamping companies in western Michigan to earn ISO certification, with every manufacturing process fully documented. Automotive and appliance business grows as a result.
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1998
Growth
A new home on Milton Street
The company more than doubles in size, moving to 1225 Milton Street and expanding to 75,000 sq ft.
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2005
Standards
ISO/TS 16949 certification
K-O raises the bar again. Automotive disciplines like PPAP and APQP are now applied to every project, in every industry.
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2018
Quality milestone
IATF 16949 certification
K-O earns IATF 16949 certification, the global quality management standard for the automotive industry and the successor to ISO/TS 16949. It strengthens our focus on defect prevention, risk-based planning, and continual improvement across every program we run.
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2025
New ownership
A new chapter of growth
Attaff Moosa and Jonas Muthana acquire K-O Products & Manufacturing Company. They keep the experienced workforce, add new talent and equipment, and launch a dedicated Centerless Grinding Department.
Meet our next chapter
Today
Manufacturing.
Connected.
Our capabilities span stamping, welding, assembly, finishing, packaging, and centerless grinding.
Explore our capabilities- 75,000 sq ft
- Manufacturing space
- Since 1938
- Benton Harbor, Michigan
New ownership in 2025
A new chapter
of growth.
- Retained The experienced workforce behind K-O
- Invested New talent, equipment, and processes
- Added A dedicated Centerless Grinding Department
In 2025, Attaff Moosa and Jonas Muthana acquired K-O Products & Manufacturing Company. Their goal was not to change the foundation customers have trusted for decades, but to build on it.
Both owners bring extensive experience in precision metal processing, particularly centerless grinding. Jonas brings years of expertise from M&M Quality Grinding, with deep knowledge of precision grinding operations, quality systems, and customer-focused manufacturing.
The new ownership team kept K-O’s experienced workforce, recognizing that the people behind K-O Products & Manufacturing Company have always been its greatest strength. They also added skilled team members and invested in new equipment and manufacturing capabilities.
Centerless grinding
A more complete manufacturing solution.
The most significant addition is a dedicated Centerless Grinding Department. It offers a full range of grinding services for industries that need precise dimensional control, superior surface finishes, and consistent quality, alongside our stamping, fabrication, and finishing work.
Explore grinding capabilitiesToday, K-O Products & Manufacturing Company combines decades of manufacturing experience with expanded technical expertise and continuous investment. The result is the same dependable quality and responsive service, from a stronger and more capable manufacturing partner.