Over 125 Years Of Combined Engineering Expertise. Keymark's engineering department offers technical assistance on a wide variety of extrusion applications. Whether you're working on a prototype, reworking a standby or starting to rethink a project, our engineering team will collaborate with you from the start. We will help translate your ideas into viable and cost-effective solutions to any design challenge. Since precise application of tolerances can be confusing, our engineering staff is also available to assist you with determining tolerances. The level of precision obtained will provide you with the quality you need, while helping you to lower your overall cost. Keymark customers can rely on responsive, innovative, and accurate assistance from our experienced engineering experts.