Triangle Sharpmaker Knife Sharpener Made using the highest quality materials Tested for quality and durability The most trusted name in your cutlery needs Simply keep the plane of your knifes blade vertical and draw the edge along each stone to sharpen. Its that simple. For keeping sharp blades, tools, and toys in optimal working condition, Spyderco sharpener set is top notch Includes 2 sets of high alumina ceramic stones; sharpens plain and flat edges, awls, darts, fishhooks, and punches All components snap into the self-contained ABS plastic base and lid, and are ready to travel Base is drilled for bolting to tables or countertops for permanent attachment in shops or kitchens; instructional leaflet and DVD included Use stones dry, without oil, water, or lubricants; scrub with plastic scouring pad and powdered abrasive cleaner; air dry