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 Medium bench stone cuts aggressively and is perfect for sharpening very dull knives or re-profiling the cutting edge of a knife or tool. 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.