Norton 4-1/2-ounce sharpening stone oil is formulated for oilstone lubrication, with the correct viscosity for smooth sharpening without loading or clogging stones; it flushes away dislodged abrasive and metal chips to prevent metal from bonding with the surface of an oilstone, and meets U.S. Pharmacopeia standards for mineral oil purity and FDA requirements for use near food …