This non-petroleum-based sharpening fluid is formulated with stone cleaning agents and corrosion inhibitors to enhance the sharpening capability of all types of stones, including diamond stones. Removes metal filings from your knife's edge during sharpening and keeps your stone's surface clean and effective. Works well with Arkansas stones to prevent clogged pores that can inhibit sharpening. Made in USA. Size: 4 oz. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Honing Solutions.