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Check out our new video to learn what we do to ensure your flat bottom holes truly meet the STANDARD of excellence.  

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About PH Tool

PH Tool Reference Standards, headquartered in Pipersville, PA, maintains a staff of skilled toolmakers, machinists, technicians, and professional management personnel (40 people and counting) dedicated to the development and manufacture of the finest quality Reference Standards available today. Our robust growth and excellent reputation in the NDT world can be attributed to our emphasis on quality, attention to detail, and innovative approaches to the most challenging requirements of our valued customers.

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Meet the Team

PH Tool Reference Standards has supplied the Nondestructive Testing (NDT) industry with high-quality Reference Standards and Test Blocks since its founding by Phil Herman Sr. in 1973. Whether you need EDM notches, Flat-bottom holes, Micro-holes, or Test Blocks, PH Tool can handle your order.

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