Spyderco's bench stones are flat and broad and ideal for honing wide tools like plane irons, chisels, large blades, woodworking equipment, even ski edges. Each 2 -Inch x8 -Inch stone comes packaged in a rigid polymer storage case complete with non-skid rubber feet for tabletop use. The Ultra-Fine bench stone polishes the cutting edge and is ideal for those who demand extreme sharpness of their tools. As with all of Spyderco's ceramic stones, use our bench stones dry without lubricants or oils. To clean: wash with fresh water and scrub metal particles from the stones with a plastic scouring pad and abrasive powered cleanser.