HONING OIL: An excellent oil for use on all sharpening stones. This special formula honing oil is recommended to be used with your stones during and after sharpening. Small metal shavings are made when you sharpen your blade and these can clog the pores in your stone. Honing oil is a light mineral oil that helps keep your stone's pores from getting clogged. Oil is necessary to maintain the effectiveness of your stone. In addition, it is a good all purpose lubricant for many of your household needs including squeaky hinges and sewing machines. Available in two sizes. 3 oz. No. 61803 and 16 oz. No. 61816