PKI was founded in a small machine and tool shop near downtown Houston in 1966. From there, we have progressed into our new 33,000 square foot facility. We are the world’s leader in replacement knives for underwater pelletizers and continue to grow into 36 countries around the world.

PKI offers custom knives for the plastics and rubber industries worldwide. In keeping with the high quality you have come to expect in underwater pelletizing knives. PKI offers the best design and materials to fit your needs. Whether you are looking to run the Bi-metal Knives, high speed metals, or tool steel, PKI will evaluate and determine the optimal metals needed for your application.