About Us

Jetool - American-made VIDEO

Jetool is a custom machining, fabrication and assembly partner that works with aerospace, defense, and niche manufacturers to provide tight tolerance, complex parts and assemblies in metal, plastic, composites, and wood. Founded as Chesaning MFG. Co., Inc. in 1963 and doing business as (DBA) Jetool since 1975, we are a time-tested quality and service leader.  Our core values are:

Family & Community -  We love to be involved and support our people, schools, and region.

Workmanship - No button pushers here. It's all about precision and attention to detail.

Customer Service - All our partners, internally and externally get our best effort and support.

Open-mindedness - We are a flexible partner and strive to flex and grow with our customers.

Growth - We believe in progress and strive to help our partners progress with us.

Integrity - We do what we say, and deliver on time, on spec, and on budget.


We boast USA's best toolmakers, machinists and welders. We are proud that our tools and fixtures are MADE in USA.  We have Veterans on staff including the CEO who served as a Cavalry Scout and Infantry Officer in the MI Army National Guard.






After building up and selling a division called Bretco, (OEM for EDM cutting and die sinking machines), Don B. purchased the assets of Jetool, an aerospace GSE and MRO tooling machine shop.  Chesaning Manufacturing Inc. began doing business as Jetool and ramped up the GSE/MRO tooling services. 


Founder Don Brettrager and his wife Patricia Brettrager retire and exit from Jetool in 2017. Their children, Tom, Jan, Dan and Ron, continue as shareholders and managers. Tom retires and exits company in 2018. 


Jetool invests in improved Certified Welding capabilities to include 17-4 PH in order to support customer projects jetool achieves AS9100-D and ISO9001:2015 certifications

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