PH Tool Reference Standards, headquartered at 6021 Easton Road, Pipersville, PA, has supplied the NDT industry with high-quality Reference Standards and Test Blocks since its founding in 1973. Whether you need EDM notches, Flat-bottom holes, Micro-holes, or Test Blocks, PH Tool can handle your order. Standards and Test Blocks are manufactured to support a wide range of industrial testing applications including Power Generation, Manufacturing, Aerospace, Research, Transportation, Aircraft, Petrochemical, Naval, Medical, and Primary Metals, to name a few. We are a family-owned business staffed by a skilled team of professionals who are dedicated to the development and fabrication of the finest quality Reference Standards available today. Our growth and high degree of product acceptance can be attributed to our emphasis on quality, attention to detail, and innovative approaches to meeting the needs of our valued customers. Meeting the demands of the increasingly complex and quality-conscious NDT marketplace is a challenge we gladly accept.