XB5 Sharpening Stone Oil NORTON XB5 Sharpening Stone Oil NORTON is a highly refined lubricating oil specifically formulated for sharpening stone use.   FEATURES BENEFITS Norton oil is a highly refined lubricating oil Specifically formulated for sharpening stone use Equally ideal for all lubricating jobs It will not load or “gum-up” sharpening stones Meets U.S. Pharmacopoeia standards May be used around food preparation operationfor mineral oil purity 473ml   Find other format here Learn more about U.S Pharmacopeia Standards here