The SP INOX keyless chucks are manufactured from stainless steel to resist chemical corrosion. All FGE and GE drill chuck models undergo bead blasting with glass balls and receive a passivation treatment through electro-polishing, providing additional corrosion protection, eliminating residual contaminants, and enhancing surface finish. They are lubricated with a special FDA approved grease suitable for food applications. These chucks also have through hole to accommodate special work holding applications. This makes the INOX series the ideal chuck for EDM, food service, clean rooms and other demanding environments.