Dan’s Honing Oil is recommended to be used with sharpening stones during and after sharpening. Small metal shavings are made when sharpening and these can clog the pores in the sharpening stone. Dan’s honing oil is a light mineral oil that helps keep stone’s pores from getting clogged. The oil is necessary to maintain the effectiveness of the stone. In addition, it is a good all-purpose lubricant for many of household needs to include squeaky hinges and sewing machines.