Valve Body Clamp Test - PDQ Workholding and Tooling The valve body clamp test is a simple and cost-effective way to verify the condition of your PDQ Workholding and Tooling products. This video shows how the valve body clamp test can be performed on PDQ Workholding products, but it may be performed on any tooling product using a borescope objective. To Know More Visit Here: https://www.youtube.com/watch?v=umb6OPFBlHk