The Die Collar tool is part of the Fishing Tools family, designed to remove downhole tools (fish) left in the well. The method of engagement with the fish is external, meaning that due to its geometry and internal spiral threads, it engages with the outer surface of the fish. After applying pressure and creating a strong initial grip (by the sharp threads penetrating the external surface of the fish), the tool removes the fish from the well.

The Die Collar tool is an integrated and relatively long tool, where the quality of the material, internal machining (threads), and the hardening process are crucial. Nasim Karvarzi Company has engineering and manufacturing experience with this tool in various sizes.