Closure Quality
Our cap making professionals—from receptionists to operators to machinists—have a vested interest in providing you with products that exceed your expectations. All closures go through multiple quality inspections before boxing and product release.
Keystone holds 3rd Party cGMP certification. We also welcome customer audits and have successfully completed pharma and food audits. Contact us for quality certifications.
Service Quality
Call us and speak with a real live person. Email us and receive a personal, non-AI reply. We invite you to experience the Keystone Cap Company difference-where every call and email is answered with a smile!
Keystone Quality
Threaded metal closures. Also called caps. Or jar lids. They may not sound like a big deal, but chances are if you’re visiting our website, they’re an integral part of your business (they're definitely an integral part of ours!). That’s why we want to tell you how we ensure you receive a consistent, quality product.