Spyderco Bench Stone 2 x 8 x 0.5 inches Fine or Medium Grit with plastic storage box. Because Spyderco's benchstones are flat and broad they are highly effective for honing wide tools like plane irons, chisels, large blades, woodworking equipment, even ski edges. Available in Medium (pictured) or Fine each stone comes packaged in a rigid polymer storage case complete with non-skid rubber feet for tabletop use. As with all of Spyderco's ceramic stones, use our benchstones 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.